20535625

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:163

約数の個数: 40

約数和(自身を含む): 29240640

約数和(自身を除く): 8705015

約数列:

[1, 5, 11, 25, 29, 55, 103, 125, 145, 275, 319, 515, 625, 725, 1133, 1375, 1595, 2575, 2987, 3625, 5665, 6875, 7975, 12875, 14935, 18125, 28325, 32857, 39875, 64375, 74675, 141625, 164285, 199375, 373375, 708125, 821425, 1866875, 4107125, 20535625]

約数ペア:

[(1, 20535625), (5, 4107125), (11, 1866875), (25, 821425), (29, 708125), (55, 373375), (103, 199375), (125, 164285), (145, 141625), (275, 74675), (319, 64375), (515, 39875), (625, 32857), (725, 28325), (1133, 18125), (1375, 14935), (1595, 12875), (2575, 7975), (2987, 6875), (3625, 5665)]