21986564

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{281}}^1\times {\mathrm{631}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 39922176

約数和(自身を除く): 17935612

約数列:

[1, 2, 4, 31, 62, 124, 281, 562, 631, 1124, 1262, 2524, 8711, 17422, 19561, 34844, 39122, 78244, 177311, 354622, 709244, 5496641, 10993282, 21986564]

約数ペア:

[(1, 21986564), (2, 10993282), (4, 5496641), (31, 709244), (62, 354622), (124, 177311), (281, 78244), (562, 39122), (631, 34844), (1124, 19561), (1262, 17422), (2524, 8711)]