21388690

素因数分解:

$2^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{6967}}^1$

素因数の和:7281

約数の個数: 16

約数和(自身を含む): 38630592

約数和(自身を除く): 17241902

約数列:

[1, 2, 5, 10, 307, 614, 1535, 3070, 6967, 13934, 34835, 69670, 2138869, 4277738, 10694345, 21388690]

約数ペア:

[(1, 21388690), (2, 10694345), (5, 4277738), (10, 2138869), (307, 69670), (614, 34835), (1535, 13934), (3070, 6967)]