20979640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47681}}^1$

素因数の和:47703

約数の個数: 32

約数和(自身を含む): 51496560

約数和(自身を除く): 30516920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47681, 95362, 190724, 238405, 381448, 476810, 524491, 953620, 1048982, 1907240, 2097964, 2622455, 4195928, 5244910, 10489820, 20979640]

約数ペア:

[(1, 20979640), (2, 10489820), (4, 5244910), (5, 4195928), (8, 2622455), (10, 2097964), (11, 1907240), (20, 1048982), (22, 953620), (40, 524491), (44, 476810), (55, 381448), (88, 238405), (110, 190724), (220, 95362), (440, 47681)]