400678720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:313

約数の個数: 168

約数和(自身を含む): 1070945280

約数和(自身を除く): 670266560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 130, 155, 160, 169, 208, 239, 248, 260, 310, 320, 338, 403, 416, 478, 496, 520, 620, 676, 806, 832, 845, 956, 992, 1040, 1195, 1240, 1352, 1612, 1690, 1912, 1984, 2015, 2080, 2390, 2480, 2704, 3107, 3224, 3380, 3824, 4030, 4160, 4780, 4960, 5239, 5408, 6214, 6448, 6760, 7409, 7648, 8060, 9560, 9920, 10478, 10816, 12428, 12896, 13520, 14818, 15296, 15535, 16120, 19120, 20956, 24856, 25792, 26195, 27040, 29636, 31070, 32240, 37045, 38240, 40391, 41912, 49712, 52390, 54080, 59272, 62140, 64480, 74090, 76480, 80782, 83824, 96317, 99424, 104780, 118544, 124280, 128960, 148180, 161564, 167648, 192634, 198848, 201955, 209560, 237088, 248560, 296360, 323128, 335296, 385268, 403910, 419120, 474176, 481585, 497120, 592720, 646256, 770536, 807820, 838240, 963170, 994240, 1185440, 1252121, 1292512, 1541072, 1615640, 1676480, 1926340, 2370880, 2504242, 2585024, 3082144, 3231280, 3852680, 5008484, 6164288, 6260605, 6462560, 7705360, 10016968, 12521210, 12925120, 15410720, 20033936, 25042420, 30821440, 40067872, 50084840, 80135744, 100169680, 200339360, 400678720]

約数ペア:

[(1, 400678720), (2, 200339360), (4, 100169680), (5, 80135744), (8, 50084840), (10, 40067872), (13, 30821440), (16, 25042420), (20, 20033936), (26, 15410720), (31, 12925120), (32, 12521210), (40, 10016968), (52, 7705360), (62, 6462560), (64, 6260605), (65, 6164288), (80, 5008484), (104, 3852680), (124, 3231280), (130, 3082144), (155, 2585024), (160, 2504242), (169, 2370880), (208, 1926340), (239, 1676480), (248, 1615640), (260, 1541072), (310, 1292512), (320, 1252121), (338, 1185440), (403, 994240), (416, 963170), (478, 838240), (496, 807820), (520, 770536), (620, 646256), (676, 592720), (806, 497120), (832, 481585), (845, 474176), (956, 419120), (992, 403910), (1040, 385268), (1195, 335296), (1240, 323128), (1352, 296360), (1612, 248560), (1690, 237088), (1912, 209560), (1984, 201955), (2015, 198848), (2080, 192634), (2390, 167648), (2480, 161564), (2704, 148180), (3107, 128960), (3224, 124280), (3380, 118544), (3824, 104780), (4030, 99424), (4160, 96317), (4780, 83824), (4960, 80782), (5239, 76480), (5408, 74090), (6214, 64480), (6448, 62140), (6760, 59272), (7409, 54080), (7648, 52390), (8060, 49712), (9560, 41912), (9920, 40391), (10478, 38240), (10816, 37045), (12428, 32240), (12896, 31070), (13520, 29636), (14818, 27040), (15296, 26195), (15535, 25792), (16120, 24856), (19120, 20956)]