21320375

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{191}}^1$

素因数の和:272

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 7433545

約数列:

[1, 5, 19, 25, 47, 95, 125, 191, 235, 475, 893, 955, 1175, 2375, 3629, 4465, 4775, 5875, 8977, 18145, 22325, 23875, 44885, 90725, 111625, 170563, 224425, 453625, 852815, 1122125, 4264075, 21320375]

約数ペア:

[(1, 21320375), (5, 4264075), (19, 1122125), (25, 852815), (47, 453625), (95, 224425), (125, 170563), (191, 111625), (235, 90725), (475, 44885), (893, 23875), (955, 22325), (1175, 18145), (2375, 8977), (3629, 5875), (4465, 4775)]