20218005

素因数分解:

$3^4\times 5^1\times {\mathrm{49921}}^1$

素因数の和:49938

約数の個数: 20

約数和(自身を含む): 36243372

約数和(自身を除く): 16025367

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49921, 149763, 249605, 449289, 748815, 1347867, 2246445, 4043601, 6739335, 20218005]

約数ペア:

[(1, 20218005), (3, 6739335), (5, 4043601), (9, 2246445), (15, 1347867), (27, 748815), (45, 449289), (81, 249605), (135, 149763), (405, 49921)]