21117628

素因数分解:

$2^2\times 7^2\times {\mathrm{163}}^1\times {\mathrm{661}}^1$

素因数の和:842

約数の個数: 36

約数和(自身を含む): 43318632

約数和(自身を除く): 22201004

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 163, 196, 326, 652, 661, 1141, 1322, 2282, 2644, 4564, 4627, 7987, 9254, 15974, 18508, 31948, 32389, 64778, 107743, 129556, 215486, 430972, 754201, 1508402, 3016804, 5279407, 10558814, 21117628]

約数ペア:

[(1, 21117628), (2, 10558814), (4, 5279407), (7, 3016804), (14, 1508402), (28, 754201), (49, 430972), (98, 215486), (163, 129556), (196, 107743), (326, 64778), (652, 32389), (661, 31948), (1141, 18508), (1322, 15974), (2282, 9254), (2644, 7987), (4564, 4627)]