20912565

素因数分解:

$3^1\times 5^1\times {\mathrm{557}}^1\times {\mathrm{2503}}^1$

素因数の和:3068

約数の個数: 16

約数和(自身を含む): 33533568

約数和(自身を除く): 12621003

約数列:

[1, 3, 5, 15, 557, 1671, 2503, 2785, 7509, 8355, 12515, 37545, 1394171, 4182513, 6970855, 20912565]

約数ペア:

[(1, 20912565), (3, 6970855), (5, 4182513), (15, 1394171), (557, 37545), (1671, 12515), (2503, 8355), (2785, 7509)]