21371445

素因数分解:

$3^4\times 5^1\times {\mathrm{52769}}^1$

素因数の和:52786

約数の個数: 20

約数和(自身を含む): 38311020

約数和(自身を除く): 16939575

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52769, 158307, 263845, 474921, 791535, 1424763, 2374605, 4274289, 7123815, 21371445]

約数ペア:

[(1, 21371445), (3, 7123815), (5, 4274289), (9, 2374605), (15, 1424763), (27, 791535), (45, 474921), (81, 263845), (135, 158307), (405, 52769)]