21002375

素因数分解:

$5^3\times {\mathrm{401}}^1\times {\mathrm{419}}^1$

素因数の和:835

約数の個数: 16

約数和(自身を含む): 26339040

約数和(自身を除く): 5336665

約数列:

[1, 5, 25, 125, 401, 419, 2005, 2095, 10025, 10475, 50125, 52375, 168019, 840095, 4200475, 21002375]

約数ペア:

[(1, 21002375), (5, 4200475), (25, 840095), (125, 168019), (401, 52375), (419, 50125), (2005, 10475), (2095, 10025)]