21390501

素因数分解:

$3^1\times {\mathrm{11}}^4\times {\mathrm{487}}^1$

素因数の和:534

約数の個数: 20

約数和(自身を含む): 31436960

約数和(自身を除く): 10046459

約数列:

[1, 3, 11, 33, 121, 363, 487, 1331, 1461, 3993, 5357, 14641, 16071, 43923, 58927, 176781, 648197, 1944591, 7130167, 21390501]

約数ペア:

[(1, 21390501), (3, 7130167), (11, 1944591), (33, 648197), (121, 176781), (363, 58927), (487, 43923), (1331, 16071), (1461, 14641), (3993, 5357)]