20217518

素因数分解:

$2^1\times {\mathrm{31}}^2\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:288

約数の個数: 24

約数和(自身を含む): 32006376

約数和(自身を除く): 11788858

約数列:

[1, 2, 31, 62, 67, 134, 157, 314, 961, 1922, 2077, 4154, 4867, 9734, 10519, 21038, 64387, 128774, 150877, 301754, 326089, 652178, 10108759, 20217518]

約数ペア:

[(1, 20217518), (2, 10108759), (31, 652178), (62, 326089), (67, 301754), (134, 150877), (157, 128774), (314, 64387), (961, 21038), (1922, 10519), (2077, 9734), (4154, 4867)]