21138467

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{227}}^1\times {\mathrm{251}}^1$

素因数の和:538

約数の個数: 16

約数和(自身を含む): 24820992

約数和(自身を除く): 3682525

約数列:

[1, 7, 53, 227, 251, 371, 1589, 1757, 12031, 13303, 56977, 84217, 93121, 398839, 3019781, 21138467]

約数ペア:

[(1, 21138467), (7, 3019781), (53, 398839), (227, 93121), (251, 84217), (371, 56977), (1589, 13303), (1757, 12031)]