21260205

素因数分解:

$3^3\times 5^1\times {\mathrm{157483}}^1$

素因数の和:157497

約数の個数: 16

約数和(自身を含む): 37796160

約数和(自身を除く): 16535955

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157483, 472449, 787415, 1417347, 2362245, 4252041, 7086735, 21260205]

約数ペア:

[(1, 21260205), (3, 7086735), (5, 4252041), (9, 2362245), (15, 1417347), (27, 787415), (45, 472449), (135, 157483)]