8405980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2011}}^1$

素因数の和:2050

約数の個数: 48

約数和(自身を含む): 20280960

約数和(自身を除く): 11874980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2011, 2090, 4022, 4180, 8044, 10055, 20110, 22121, 38209, 40220, 44242, 76418, 88484, 110605, 152836, 191045, 221210, 382090, 420299, 442420, 764180, 840598, 1681196, 2101495, 4202990, 8405980]

約数ペア:

[(1, 8405980), (2, 4202990), (4, 2101495), (5, 1681196), (10, 840598), (11, 764180), (19, 442420), (20, 420299), (22, 382090), (38, 221210), (44, 191045), (55, 152836), (76, 110605), (95, 88484), (110, 76418), (190, 44242), (209, 40220), (220, 38209), (380, 22121), (418, 20110), (836, 10055), (1045, 8044), (2011, 4180), (2090, 4022)]