21767668

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{647}}^2$

素因数の和:1311

約数の個数: 18

約数和(自身を含む): 41087186

約数和(自身を除く): 19319518

約数列:

[1, 2, 4, 13, 26, 52, 647, 1294, 2588, 8411, 16822, 33644, 418609, 837218, 1674436, 5441917, 10883834, 21767668]

約数ペア:

[(1, 21767668), (2, 10883834), (4, 5441917), (13, 1674436), (26, 837218), (52, 418609), (647, 33644), (1294, 16822), (2588, 8411)]