21047830

素因数分解:

$2^1\times 5^1\times {\mathrm{1223}}^1\times {\mathrm{1721}}^1$

素因数の和:2951

約数の個数: 16

約数和(自身を含む): 37939104

約数和(自身を除く): 16891274

約数列:

[1, 2, 5, 10, 1223, 1721, 2446, 3442, 6115, 8605, 12230, 17210, 2104783, 4209566, 10523915, 21047830]

約数ペア:

[(1, 21047830), (2, 10523915), (5, 4209566), (10, 2104783), (1223, 17210), (1721, 12230), (2446, 8605), (3442, 6115)]