81321225

素因数分解:

$3^1\times 5^2\times {\mathrm{257}}^1\times {\mathrm{4219}}^1$

素因数の和:4489

約数の個数: 24

約数和(自身を含む): 135006240

約数和(自身を除く): 53685015

約数列:

[1, 3, 5, 15, 25, 75, 257, 771, 1285, 3855, 4219, 6425, 12657, 19275, 21095, 63285, 105475, 316425, 1084283, 3252849, 5421415, 16264245, 27107075, 81321225]

約数ペア:

[(1, 81321225), (3, 27107075), (5, 16264245), (15, 5421415), (25, 3252849), (75, 1084283), (257, 316425), (771, 105475), (1285, 63285), (3855, 21095), (4219, 19275), (6425, 12657)]