21021625

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{3911}}^1$

素因数の和:3969

約数の個数: 16

約数和(自身を含む): 26851968

約数和(自身を除く): 5830343

約数列:

[1, 5, 25, 43, 125, 215, 1075, 3911, 5375, 19555, 97775, 168173, 488875, 840865, 4204325, 21021625]

約数ペア:

[(1, 21021625), (5, 4204325), (25, 840865), (43, 488875), (125, 168173), (215, 97775), (1075, 19555), (3911, 5375)]