21513804

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{137909}}^1$

素因数の和:137929

約数の個数: 24

約数和(自身を含む): 54060720

約数和(自身を除く): 32546916

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 137909, 275818, 413727, 551636, 827454, 1654908, 1792817, 3585634, 5378451, 7171268, 10756902, 21513804]

約数ペア:

[(1, 21513804), (2, 10756902), (3, 7171268), (4, 5378451), (6, 3585634), (12, 1792817), (13, 1654908), (26, 827454), (39, 551636), (52, 413727), (78, 275818), (156, 137909)]