21716770

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{419}}^1$

素因数の和:570

約数の個数: 32

約数和(自身を含む): 40279680

約数和(自身を除く): 18562910

約数列:

[1, 2, 5, 10, 71, 73, 142, 146, 355, 365, 419, 710, 730, 838, 2095, 4190, 5183, 10366, 25915, 29749, 30587, 51830, 59498, 61174, 148745, 152935, 297490, 305870, 2171677, 4343354, 10858385, 21716770]

約数ペア:

[(1, 21716770), (2, 10858385), (5, 4343354), (10, 2171677), (71, 305870), (73, 297490), (142, 152935), (146, 148745), (355, 61174), (365, 59498), (419, 51830), (710, 30587), (730, 29749), (838, 25915), (2095, 10366), (4190, 5183)]