21239452

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{1709}}^1$

素因数の和:1965

約数の個数: 24

約数和(自身を含む): 40219200

約数和(自身を除く): 18979748

約数列:

[1, 2, 4, 13, 26, 52, 239, 478, 956, 1709, 3107, 3418, 6214, 6836, 12428, 22217, 44434, 88868, 408451, 816902, 1633804, 5309863, 10619726, 21239452]

約数ペア:

[(1, 21239452), (2, 10619726), (4, 5309863), (13, 1633804), (26, 816902), (52, 408451), (239, 88868), (478, 44434), (956, 22217), (1709, 12428), (3107, 6836), (3418, 6214)]