20010640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:368

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30986096

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 71, 80, 104, 130, 142, 208, 260, 271, 284, 355, 520, 542, 568, 710, 923, 1040, 1084, 1136, 1355, 1420, 1846, 2168, 2710, 2840, 3523, 3692, 4336, 4615, 5420, 5680, 7046, 7384, 9230, 10840, 14092, 14768, 17615, 18460, 19241, 21680, 28184, 35230, 36920, 38482, 56368, 70460, 73840, 76964, 96205, 140920, 153928, 192410, 250133, 281840, 307856, 384820, 500266, 769640, 1000532, 1250665, 1539280, 2001064, 2501330, 4002128, 5002660, 10005320, 20010640]

約数ペア:

[(1, 20010640), (2, 10005320), (4, 5002660), (5, 4002128), (8, 2501330), (10, 2001064), (13, 1539280), (16, 1250665), (20, 1000532), (26, 769640), (40, 500266), (52, 384820), (65, 307856), (71, 281840), (80, 250133), (104, 192410), (130, 153928), (142, 140920), (208, 96205), (260, 76964), (271, 73840), (284, 70460), (355, 56368), (520, 38482), (542, 36920), (568, 35230), (710, 28184), (923, 21680), (1040, 19241), (1084, 18460), (1136, 17615), (1355, 14768), (1420, 14092), (1846, 10840), (2168, 9230), (2710, 7384), (2840, 7046), (3523, 5680), (3692, 5420), (4336, 4615)]