21498981

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12959}}^1$

素因数の和:13048

約数の個数: 16

約数和(自身を含む): 33177600

約数和(自身を除く): 11678619

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12959, 38877, 90713, 272139, 1023761, 3071283, 7166327, 21498981]

約数ペア:

[(1, 21498981), (3, 7166327), (7, 3071283), (21, 1023761), (79, 272139), (237, 90713), (553, 38877), (1659, 12959)]