21171921

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{569}}^1$

素因数の和:808

約数の個数: 16

約数和(自身を含む): 28819200

約数和(自身を除く): 7647279

約数列:

[1, 3, 79, 157, 237, 471, 569, 1707, 12403, 37209, 44951, 89333, 134853, 267999, 7057307, 21171921]

約数ペア:

[(1, 21171921), (3, 7057307), (79, 267999), (157, 134853), (237, 89333), (471, 44951), (569, 37209), (1707, 12403)]