18816220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{11909}}^1$

素因数の和:11997

約数の個数: 24

約数和(自身を含む): 40017600

約数和(自身を除く): 21201380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 11909, 23818, 47636, 59545, 119090, 238180, 940811, 1881622, 3763244, 4704055, 9408110, 18816220]

約数ペア:

[(1, 18816220), (2, 9408110), (4, 4704055), (5, 3763244), (10, 1881622), (20, 940811), (79, 238180), (158, 119090), (316, 59545), (395, 47636), (790, 23818), (1580, 11909)]