21292479

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13999}}^1$

素因数の和:14031

約数の個数: 18

約数和(自身を含む): 33306000

約数和(自身を除く): 12013521

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13999, 41997, 125991, 181987, 545961, 1637883, 2365831, 7097493, 21292479]

約数ペア:

[(1, 21292479), (3, 7097493), (9, 2365831), (13, 1637883), (39, 545961), (117, 181987), (169, 125991), (507, 41997), (1521, 13999)]