20878851

素因数分解:

$3^1\times 7^2\times {\mathrm{173}}^1\times {\mathrm{821}}^1$

素因数の和:1011

約数の個数: 24

約数和(自身を含む): 32610384

約数和(自身を除く): 11731533

約数列:

[1, 3, 7, 21, 49, 147, 173, 519, 821, 1211, 2463, 3633, 5747, 8477, 17241, 25431, 40229, 120687, 142033, 426099, 994231, 2982693, 6959617, 20878851]

約数ペア:

[(1, 20878851), (3, 6959617), (7, 2982693), (21, 994231), (49, 426099), (147, 142033), (173, 120687), (519, 40229), (821, 25431), (1211, 17241), (2463, 8477), (3633, 5747)]