21086675

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{431}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 6768685

約数列:

[1, 5, 19, 25, 95, 103, 431, 475, 515, 1957, 2155, 2575, 8189, 9785, 10775, 40945, 44393, 48925, 204725, 221965, 843467, 1109825, 4217335, 21086675]

約数ペア:

[(1, 21086675), (5, 4217335), (19, 1109825), (25, 843467), (95, 221965), (103, 204725), (431, 48925), (475, 44393), (515, 40945), (1957, 10775), (2155, 9785), (2575, 8189)]