21643375

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{701}}^1$

素因数の和:748

約数の個数: 32

約数和(自身を含む): 30663360

約数和(自身を除く): 9019985

約数列:

[1, 5, 13, 19, 25, 65, 95, 125, 247, 325, 475, 701, 1235, 1625, 2375, 3505, 6175, 9113, 13319, 17525, 30875, 45565, 66595, 87625, 173147, 227825, 332975, 865735, 1139125, 1664875, 4328675, 21643375]

約数ペア:

[(1, 21643375), (5, 4328675), (13, 1664875), (19, 1139125), (25, 865735), (65, 332975), (95, 227825), (125, 173147), (247, 87625), (325, 66595), (475, 45565), (701, 30875), (1235, 17525), (1625, 13319), (2375, 9113), (3505, 6175)]