20858715

素因数分解:

$3^4\times 5^1\times {\mathrm{51503}}^1$

素因数の和:51520

約数の個数: 20

約数和(自身を含む): 37391904

約数和(自身を除く): 16533189

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51503, 154509, 257515, 463527, 772545, 1390581, 2317635, 4171743, 6952905, 20858715]

約数ペア:

[(1, 20858715), (3, 6952905), (5, 4171743), (9, 2317635), (15, 1390581), (27, 772545), (45, 463527), (81, 257515), (135, 154509), (405, 51503)]