21190468

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{407509}}^1$

素因数の和:407526

約数の個数: 12

約数和(自身を含む): 39935980

約数和(自身を除く): 18745512

約数列:

[1, 2, 4, 13, 26, 52, 407509, 815018, 1630036, 5297617, 10595234, 21190468]

約数ペア:

[(1, 21190468), (2, 10595234), (4, 5297617), (13, 1630036), (26, 815018), (52, 407509)]