21807561

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1\times {\mathrm{443}}^1$

素因数の和:776

約数の個数: 16

約数和(自身を含む): 29730240

約数和(自身を除く): 7922679

約数列:

[1, 3, 61, 183, 269, 443, 807, 1329, 16409, 27023, 49227, 81069, 119167, 357501, 7269187, 21807561]

約数ペア:

[(1, 21807561), (3, 7269187), (61, 357501), (183, 119167), (269, 81069), (443, 49227), (807, 27023), (1329, 16409)]