20987764

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{25847}}^1$

素因数の和:25887

約数の個数: 24

約数和(自身を含む): 43424640

約数和(自身を除く): 22436876

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812, 25847, 51694, 103388, 180929, 361858, 723716, 749563, 1499126, 2998252, 5246941, 10493882, 20987764]

約数ペア:

[(1, 20987764), (2, 10493882), (4, 5246941), (7, 2998252), (14, 1499126), (28, 749563), (29, 723716), (58, 361858), (116, 180929), (203, 103388), (406, 51694), (812, 25847)]