20856915

素因数分解:

$3^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{1723}}^1$

素因数の和:2003

約数の個数: 24

約数和(自身を含む): 36307440

約数和(自身を除く): 15450525

約数列:

[1, 3, 5, 9, 15, 45, 269, 807, 1345, 1723, 2421, 4035, 5169, 8615, 12105, 15507, 25845, 77535, 463487, 1390461, 2317435, 4171383, 6952305, 20856915]

約数ペア:

[(1, 20856915), (3, 6952305), (5, 4171383), (9, 2317435), (15, 1390461), (45, 463487), (269, 77535), (807, 25845), (1345, 15507), (1723, 12105), (2421, 8615), (4035, 5169)]