21892420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{521}}^1$

素因数の和:732

約数の個数: 48

約数和(自身を含む): 50512896

約数和(自身を除く): 28620476

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 521, 764, 955, 1042, 1910, 2084, 2101, 2605, 3820, 4202, 5210, 5731, 8404, 10420, 10505, 11462, 21010, 22924, 28655, 42020, 57310, 99511, 114620, 199022, 398044, 497555, 995110, 1094621, 1990220, 2189242, 4378484, 5473105, 10946210, 21892420]

約数ペア:

[(1, 21892420), (2, 10946210), (4, 5473105), (5, 4378484), (10, 2189242), (11, 1990220), (20, 1094621), (22, 995110), (44, 497555), (55, 398044), (110, 199022), (191, 114620), (220, 99511), (382, 57310), (521, 42020), (764, 28655), (955, 22924), (1042, 21010), (1910, 11462), (2084, 10505), (2101, 10420), (2605, 8404), (3820, 5731), (4202, 5210)]