21986145

素因数分解:

$3^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1571}}^1$

素因数の和:1893

約数の個数: 24

約数和(自身を含む): 38256192

約数和(自身を除く): 16270047

約数列:

[1, 3, 5, 9, 15, 45, 311, 933, 1555, 1571, 2799, 4665, 4713, 7855, 13995, 14139, 23565, 70695, 488581, 1465743, 2442905, 4397229, 7328715, 21986145]

約数ペア:

[(1, 21986145), (3, 7328715), (5, 4397229), (9, 2442905), (15, 1465743), (45, 488581), (311, 70695), (933, 23565), (1555, 14139), (1571, 13995), (2799, 7855), (4665, 4713)]