20408889616

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9176659}}^1$

素因数の和:9176806

約数の個数: 20

約数和(自身を含む): 39826704400

約数和(自身を除く): 19417814784

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9176659, 18353318, 36706636, 73413272, 146826544, 1275555601, 2551111202, 5102222404, 10204444808, 20408889616]

約数ペア:

[(1, 20408889616), (2, 10204444808), (4, 5102222404), (8, 2551111202), (16, 1275555601), (139, 146826544), (278, 73413272), (556, 36706636), (1112, 18353318), (2224, 9176659)]