20739884

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{587}}^1$

素因数の和:686

約数の個数: 36

約数和(自身を含む): 40509672

約数和(自身を除く): 19769788

約数列:

[1, 2, 4, 11, 22, 44, 73, 121, 146, 242, 292, 484, 587, 803, 1174, 1606, 2348, 3212, 6457, 8833, 12914, 17666, 25828, 35332, 42851, 71027, 85702, 142054, 171404, 284108, 471361, 942722, 1885444, 5184971, 10369942, 20739884]

約数ペア:

[(1, 20739884), (2, 10369942), (4, 5184971), (11, 1885444), (22, 942722), (44, 471361), (73, 284108), (121, 171404), (146, 142054), (242, 85702), (292, 71027), (484, 42851), (587, 35332), (803, 25828), (1174, 17666), (1606, 12914), (2348, 8833), (3212, 6457)]