20997651

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:678

約数の個数: 16

約数和(自身を含む): 28503200

約数和(自身を除く): 7505549

約数列:

[1, 3, 109, 157, 327, 409, 471, 1227, 17113, 44581, 51339, 64213, 133743, 192639, 6999217, 20997651]

約数ペア:

[(1, 20997651), (3, 6999217), (109, 192639), (157, 133743), (327, 64213), (409, 51339), (471, 44581), (1227, 17113)]