21909811

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{5807}}^1$

素因数の和:5839

約数の個数: 16

約数和(自身を含む): 27878400

約数和(自身を除く): 5968589

約数列:

[1, 7, 11, 49, 77, 343, 539, 3773, 5807, 40649, 63877, 284543, 447139, 1991801, 3129973, 21909811]

約数ペア:

[(1, 21909811), (7, 3129973), (11, 1991801), (49, 447139), (77, 284543), (343, 63877), (539, 40649), (3773, 5807)]