20668675

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{821}}^1$

素因数の和:903

約数の個数: 24

約数和(自身を含む): 27520560

約数和(自身を除く): 6851885

約数列:

[1, 5, 19, 25, 53, 95, 265, 475, 821, 1007, 1325, 4105, 5035, 15599, 20525, 25175, 43513, 77995, 217565, 389975, 826747, 1087825, 4133735, 20668675]

約数ペア:

[(1, 20668675), (5, 4133735), (19, 1087825), (25, 826747), (53, 389975), (95, 217565), (265, 77995), (475, 43513), (821, 25175), (1007, 20525), (1325, 15599), (4105, 5035)]