397777820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{164371}}^1$

素因数の和:164402

約数の個数: 36

約数和(自身を含む): 918181992

約数和(自身を除く): 520404172

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 164371, 328742, 657484, 821855, 1643710, 1808081, 3287420, 3616162, 7232324, 9040405, 18080810, 19888891, 36161620, 39777782, 79555564, 99444455, 198888910, 397777820]

約数ペア:

[(1, 397777820), (2, 198888910), (4, 99444455), (5, 79555564), (10, 39777782), (11, 36161620), (20, 19888891), (22, 18080810), (44, 9040405), (55, 7232324), (110, 3616162), (121, 3287420), (220, 1808081), (242, 1643710), (484, 821855), (605, 657484), (1210, 328742), (2420, 164371)]