21490868

素因数分解:

$2^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{13009}}^1$

素因数の和:13079

約数の個数: 24

約数和(自身を含む): 43713600

約数和(自身を除く): 22222732

約数列:

[1, 2, 4, 7, 14, 28, 59, 118, 236, 413, 826, 1652, 13009, 26018, 52036, 91063, 182126, 364252, 767531, 1535062, 3070124, 5372717, 10745434, 21490868]

約数ペア:

[(1, 21490868), (2, 10745434), (4, 5372717), (7, 3070124), (14, 1535062), (28, 767531), (59, 364252), (118, 182126), (236, 91063), (413, 52036), (826, 26018), (1652, 13009)]