21538139

素因数分解:

$7^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{373}}^1$

素因数の和:566

約数の個数: 16

約数和(自身を含む): 25240512

約数和(自身を除く): 3702373

約数列:

[1, 7, 73, 113, 373, 511, 791, 2611, 8249, 27229, 42149, 57743, 190603, 295043, 3076877, 21538139]

約数ペア:

[(1, 21538139), (7, 3076877), (73, 295043), (113, 190603), (373, 57743), (511, 42149), (791, 27229), (2611, 8249)]