8402020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{211}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 19446336

約数和(自身を除く): 11044316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 211, 220, 362, 422, 724, 844, 905, 1055, 1810, 1991, 2110, 2321, 3620, 3982, 4220, 4642, 7964, 9284, 9955, 11605, 19910, 23210, 38191, 39820, 46420, 76382, 152764, 190955, 381910, 420101, 763820, 840202, 1680404, 2100505, 4201010, 8402020]

約数ペア:

[(1, 8402020), (2, 4201010), (4, 2100505), (5, 1680404), (10, 840202), (11, 763820), (20, 420101), (22, 381910), (44, 190955), (55, 152764), (110, 76382), (181, 46420), (211, 39820), (220, 38191), (362, 23210), (422, 19910), (724, 11605), (844, 9955), (905, 9284), (1055, 7964), (1810, 4642), (1991, 4220), (2110, 3982), (2321, 3620)]