20672260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{991}}^1$

素因数の和:1156

約数の個数: 48

約数和(自身を含む): 49996800

約数和(自身を除く): 29324540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 991, 1043, 1490, 1982, 2086, 2980, 3964, 4172, 4955, 5215, 6937, 9910, 10430, 13874, 19820, 20860, 27748, 34685, 69370, 138740, 147659, 295318, 590636, 738295, 1033613, 1476590, 2067226, 2953180, 4134452, 5168065, 10336130, 20672260]

約数ペア:

[(1, 20672260), (2, 10336130), (4, 5168065), (5, 4134452), (7, 2953180), (10, 2067226), (14, 1476590), (20, 1033613), (28, 738295), (35, 590636), (70, 295318), (140, 147659), (149, 138740), (298, 69370), (596, 34685), (745, 27748), (991, 20860), (1043, 19820), (1490, 13874), (1982, 10430), (2086, 9910), (2980, 6937), (3964, 5215), (4172, 4955)]