21505988

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{7457}}^1$

素因数の和:7571

約数の個数: 24

約数和(自身を含む): 43435392

約数和(自身を除く): 21929404

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 412, 721, 1442, 2884, 7457, 14914, 29828, 52199, 104398, 208796, 768071, 1536142, 3072284, 5376497, 10752994, 21505988]

約数ペア:

[(1, 21505988), (2, 10752994), (4, 5376497), (7, 3072284), (14, 1536142), (28, 768071), (103, 208796), (206, 104398), (412, 52199), (721, 29828), (1442, 14914), (2884, 7457)]