420450640

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{937}}^1$

素因数の和:1100

約数の個数: 80

約数和(自身を含む): 1004935680

約数和(自身を除く): 584485040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 79, 80, 142, 158, 284, 316, 355, 395, 568, 632, 710, 790, 937, 1136, 1264, 1420, 1580, 1874, 2840, 3160, 3748, 4685, 5609, 5680, 6320, 7496, 9370, 11218, 14992, 18740, 22436, 28045, 37480, 44872, 56090, 66527, 74023, 74960, 89744, 112180, 133054, 148046, 224360, 266108, 296092, 332635, 370115, 448720, 532216, 592184, 665270, 740230, 1064432, 1184368, 1330540, 1480460, 2661080, 2960920, 5255633, 5322160, 5921840, 10511266, 21022532, 26278165, 42045064, 52556330, 84090128, 105112660, 210225320, 420450640]

約数ペア:

[(1, 420450640), (2, 210225320), (4, 105112660), (5, 84090128), (8, 52556330), (10, 42045064), (16, 26278165), (20, 21022532), (40, 10511266), (71, 5921840), (79, 5322160), (80, 5255633), (142, 2960920), (158, 2661080), (284, 1480460), (316, 1330540), (355, 1184368), (395, 1064432), (568, 740230), (632, 665270), (710, 592184), (790, 532216), (937, 448720), (1136, 370115), (1264, 332635), (1420, 296092), (1580, 266108), (1874, 224360), (2840, 148046), (3160, 133054), (3748, 112180), (4685, 89744), (5609, 74960), (5680, 74023), (6320, 66527), (7496, 56090), (9370, 44872), (11218, 37480), (14992, 28045), (18740, 22436)]