21098959

素因数分解:

$7^3\times {\mathrm{137}}^1\times {\mathrm{449}}^1$

素因数の和:607

約数の個数: 16

約数和(自身を含む): 24840000

約数和(自身を除く): 3741041

約数列:

[1, 7, 49, 137, 343, 449, 959, 3143, 6713, 22001, 46991, 61513, 154007, 430591, 3014137, 21098959]

約数ペア:

[(1, 21098959), (7, 3014137), (49, 430591), (137, 154007), (343, 61513), (449, 46991), (959, 22001), (3143, 6713)]