21371080

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6763}}^1$

素因数の和:6853

約数の個数: 32

約数和(自身を含む): 48700800

約数和(自身を除く): 27329720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6763, 13526, 27052, 33815, 54104, 67630, 135260, 270520, 534277, 1068554, 2137108, 2671385, 4274216, 5342770, 10685540, 21371080]

約数ペア:

[(1, 21371080), (2, 10685540), (4, 5342770), (5, 4274216), (8, 2671385), (10, 2137108), (20, 1068554), (40, 534277), (79, 270520), (158, 135260), (316, 67630), (395, 54104), (632, 33815), (790, 27052), (1580, 13526), (3160, 6763)]