21982121

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1\times {\mathrm{307}}^1$

素因数の和:560

約数の個数: 16

約数和(自身を含む): 25812864

約数和(自身を除く): 3830743

約数列:

[1, 7, 53, 193, 307, 371, 1351, 2149, 10229, 16271, 59251, 71603, 113897, 414757, 3140303, 21982121]

約数ペア:

[(1, 21982121), (7, 3140303), (53, 414757), (193, 113897), (307, 71603), (371, 59251), (1351, 16271), (2149, 10229)]