640445120

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:479

約数の個数: 224

約数和(自身を含む): 1882054656

約数和(自身を除く): 1241609536

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 31, 32, 35, 40, 46, 56, 62, 64, 70, 80, 92, 112, 115, 124, 140, 155, 160, 161, 184, 217, 224, 230, 248, 280, 310, 320, 322, 368, 401, 434, 448, 460, 496, 560, 620, 644, 713, 736, 802, 805, 868, 920, 992, 1085, 1120, 1240, 1288, 1426, 1472, 1604, 1610, 1736, 1840, 1984, 2005, 2170, 2240, 2480, 2576, 2807, 2852, 3208, 3220, 3472, 3565, 3680, 4010, 4340, 4960, 4991, 5152, 5614, 5704, 6416, 6440, 6944, 7130, 7360, 8020, 8680, 9223, 9920, 9982, 10304, 11228, 11408, 12431, 12832, 12880, 13888, 14035, 14260, 16040, 17360, 18446, 19964, 22456, 22816, 24862, 24955, 25664, 25760, 28070, 28520, 32080, 34720, 36892, 39928, 44912, 45632, 46115, 49724, 49910, 51520, 56140, 57040, 62155, 64160, 64561, 69440, 73784, 79856, 87017, 89824, 92230, 99448, 99820, 112280, 114080, 124310, 128320, 129122, 147568, 159712, 174034, 179648, 184460, 198896, 199640, 224560, 228160, 248620, 258244, 285913, 295136, 319424, 322805, 348068, 368920, 397792, 399280, 435085, 449120, 497240, 516488, 571826, 590272, 645610, 696136, 737840, 795584, 798560, 870170, 898240, 994480, 1032976, 1143652, 1291220, 1392272, 1429565, 1475680, 1597120, 1740340, 1988960, 2001391, 2065952, 2287304, 2582440, 2784544, 2859130, 2951360, 3480680, 3977920, 4002782, 4131904, 4574608, 5164880, 5569088, 5718260, 6961360, 8005564, 9149216, 10006955, 10329760, 11436520, 13922720, 16011128, 18298432, 20013910, 20659520, 22873040, 27845440, 32022256, 40027820, 45746080, 64044512, 80055640, 91492160, 128089024, 160111280, 320222560, 640445120]

約数ペア:

[(1, 640445120), (2, 320222560), (4, 160111280), (5, 128089024), (7, 91492160), (8, 80055640), (10, 64044512), (14, 45746080), (16, 40027820), (20, 32022256), (23, 27845440), (28, 22873040), (31, 20659520), (32, 20013910), (35, 18298432), (40, 16011128), (46, 13922720), (56, 11436520), (62, 10329760), (64, 10006955), (70, 9149216), (80, 8005564), (92, 6961360), (112, 5718260), (115, 5569088), (124, 5164880), (140, 4574608), (155, 4131904), (160, 4002782), (161, 3977920), (184, 3480680), (217, 2951360), (224, 2859130), (230, 2784544), (248, 2582440), (280, 2287304), (310, 2065952), (320, 2001391), (322, 1988960), (368, 1740340), (401, 1597120), (434, 1475680), (448, 1429565), (460, 1392272), (496, 1291220), (560, 1143652), (620, 1032976), (644, 994480), (713, 898240), (736, 870170), (802, 798560), (805, 795584), (868, 737840), (920, 696136), (992, 645610), (1085, 590272), (1120, 571826), (1240, 516488), (1288, 497240), (1426, 449120), (1472, 435085), (1604, 399280), (1610, 397792), (1736, 368920), (1840, 348068), (1984, 322805), (2005, 319424), (2170, 295136), (2240, 285913), (2480, 258244), (2576, 248620), (2807, 228160), (2852, 224560), (3208, 199640), (3220, 198896), (3472, 184460), (3565, 179648), (3680, 174034), (4010, 159712), (4340, 147568), (4960, 129122), (4991, 128320), (5152, 124310), (5614, 114080), (5704, 112280), (6416, 99820), (6440, 99448), (6944, 92230), (7130, 89824), (7360, 87017), (8020, 79856), (8680, 73784), (9223, 69440), (9920, 64561), (9982, 64160), (10304, 62155), (11228, 57040), (11408, 56140), (12431, 51520), (12832, 49910), (12880, 49724), (13888, 46115), (14035, 45632), (14260, 44912), (16040, 39928), (17360, 36892), (18446, 34720), (19964, 32080), (22456, 28520), (22816, 28070), (24862, 25760), (24955, 25664)]