21990860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64679}}^1$

素因数の和:64705

約数の個数: 24

約数和(自身を含む): 48898080

約数和(自身を除く): 26907220

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64679, 129358, 258716, 323395, 646790, 1099543, 1293580, 2199086, 4398172, 5497715, 10995430, 21990860]

約数ペア:

[(1, 21990860), (2, 10995430), (4, 5497715), (5, 4398172), (10, 2199086), (17, 1293580), (20, 1099543), (34, 646790), (68, 323395), (85, 258716), (170, 129358), (340, 64679)]