257028440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:285

約数の個数: 128

約数和(自身を含む): 643852800

約数和(自身を除く): 386824360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 62, 68, 85, 89, 124, 136, 137, 155, 170, 178, 248, 274, 310, 340, 356, 445, 527, 548, 620, 680, 685, 712, 890, 1054, 1096, 1240, 1370, 1513, 1780, 2108, 2329, 2635, 2740, 2759, 3026, 3560, 4216, 4247, 4658, 5270, 5480, 5518, 6052, 7565, 8494, 9316, 10540, 11036, 11645, 12104, 12193, 13795, 15130, 16988, 18632, 21080, 21235, 22072, 23290, 24386, 27590, 30260, 33976, 42470, 46580, 46903, 48772, 55180, 60520, 60965, 72199, 84940, 93160, 93806, 97544, 110360, 121930, 144398, 169880, 187612, 207281, 234515, 243860, 288796, 360995, 375224, 377983, 414562, 469030, 487720, 577592, 721990, 755966, 829124, 938060, 1036405, 1443980, 1511932, 1658248, 1876120, 1889915, 2072810, 2887960, 3023864, 3779830, 4145620, 6425711, 7559660, 8291240, 12851422, 15119320, 25702844, 32128555, 51405688, 64257110, 128514220, 257028440]

約数ペア:

[(1, 257028440), (2, 128514220), (4, 64257110), (5, 51405688), (8, 32128555), (10, 25702844), (17, 15119320), (20, 12851422), (31, 8291240), (34, 7559660), (40, 6425711), (62, 4145620), (68, 3779830), (85, 3023864), (89, 2887960), (124, 2072810), (136, 1889915), (137, 1876120), (155, 1658248), (170, 1511932), (178, 1443980), (248, 1036405), (274, 938060), (310, 829124), (340, 755966), (356, 721990), (445, 577592), (527, 487720), (548, 469030), (620, 414562), (680, 377983), (685, 375224), (712, 360995), (890, 288796), (1054, 243860), (1096, 234515), (1240, 207281), (1370, 187612), (1513, 169880), (1780, 144398), (2108, 121930), (2329, 110360), (2635, 97544), (2740, 93806), (2759, 93160), (3026, 84940), (3560, 72199), (4216, 60965), (4247, 60520), (4658, 55180), (5270, 48772), (5480, 46903), (5518, 46580), (6052, 42470), (7565, 33976), (8494, 30260), (9316, 27590), (10540, 24386), (11036, 23290), (11645, 22072), (12104, 21235), (12193, 21080), (13795, 18632), (15130, 16988)]