21780772

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{418861}}^1$

素因数の和:418878

約数の個数: 12

約数和(自身を含む): 41048476

約数和(自身を除く): 19267704

約数列:

[1, 2, 4, 13, 26, 52, 418861, 837722, 1675444, 5445193, 10890386, 21780772]

約数ペア:

[(1, 21780772), (2, 10890386), (4, 5445193), (13, 1675444), (26, 837722), (52, 418861)]