20529775

素因数分解:

$5^2\times 7^2\times {\mathrm{16759}}^1$

素因数の和:16783

約数の個数: 18

約数和(自身を含む): 29614920

約数和(自身を除く): 9085145

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 16759, 83795, 117313, 418975, 586565, 821191, 2932825, 4105955, 20529775]

約数ペア:

[(1, 20529775), (5, 4105955), (7, 2932825), (25, 821191), (35, 586565), (49, 418975), (175, 117313), (245, 83795), (1225, 16759)]