19915900

素因数分解:

$2^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{2521}}^1$

素因数の和:2614

約数の個数: 36

約数和(自身を含む): 43781920

約数和(自身を除く): 23866020

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 158, 316, 395, 790, 1580, 1975, 2521, 3950, 5042, 7900, 10084, 12605, 25210, 50420, 63025, 126050, 199159, 252100, 398318, 796636, 995795, 1991590, 3983180, 4978975, 9957950, 19915900]

約数ペア:

[(1, 19915900), (2, 9957950), (4, 4978975), (5, 3983180), (10, 1991590), (20, 995795), (25, 796636), (50, 398318), (79, 252100), (100, 199159), (158, 126050), (316, 63025), (395, 50420), (790, 25210), (1580, 12605), (1975, 10084), (2521, 7900), (3950, 5042)]