18808212890

素因数分解:

$2^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{4467509}}^1$

素因数の和:4467937

約数の個数: 16

約数和(自身を含む): 33935205960

約数和(自身を除く): 15126993070

約数列:

[1, 2, 5, 10, 421, 842, 2105, 4210, 4467509, 8935018, 22337545, 44675090, 1880821289, 3761642578, 9404106445, 18808212890]

約数ペア:

[(1, 18808212890), (2, 9404106445), (5, 3761642578), (10, 1880821289), (421, 44675090), (842, 22337545), (2105, 8935018), (4210, 4467509)]