19997620

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{13697}}^1$

素因数の和:13779

約数の個数: 24

約数和(自身を含む): 42573384

約数和(自身を除く): 22575764

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 13697, 27394, 54788, 68485, 136970, 273940, 999881, 1999762, 3999524, 4999405, 9998810, 19997620]

約数ペア:

[(1, 19997620), (2, 9998810), (4, 4999405), (5, 3999524), (10, 1999762), (20, 999881), (73, 273940), (146, 136970), (292, 68485), (365, 54788), (730, 27394), (1460, 13697)]