21170875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:288

約数の個数: 32

約数和(自身を含む): 29315520

約数和(自身を除く): 8144645

約数列:

[1, 5, 11, 25, 55, 89, 125, 173, 275, 445, 865, 979, 1375, 1903, 2225, 4325, 4895, 9515, 11125, 15397, 21625, 24475, 47575, 76985, 122375, 169367, 237875, 384925, 846835, 1924625, 4234175, 21170875]

約数ペア:

[(1, 21170875), (5, 4234175), (11, 1924625), (25, 846835), (55, 384925), (89, 237875), (125, 169367), (173, 122375), (275, 76985), (445, 47575), (865, 24475), (979, 21625), (1375, 15397), (1903, 11125), (2225, 9515), (4325, 4895)]