18821425

素因数分解:

$5^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{821}}^1$

素因数の和:969

約数の個数: 24

約数和(自身を含む): 26908992

約数和(自身を除く): 8087567

約数列:

[1, 5, 7, 25, 35, 131, 175, 655, 821, 917, 3275, 4105, 4585, 5747, 20525, 22925, 28735, 107551, 143675, 537755, 752857, 2688775, 3764285, 18821425]

約数ペア:

[(1, 18821425), (5, 3764285), (7, 2688775), (25, 752857), (35, 537755), (131, 143675), (175, 107551), (655, 28735), (821, 22925), (917, 20525), (3275, 5747), (4105, 4585)]