21427731

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{373}}^1\times {\mathrm{491}}^1$

素因数の和:883

約数の個数: 24

約数和(自身を含む): 33489456

約数和(自身を除く): 12061725

約数列:

[1, 3, 9, 13, 39, 117, 373, 491, 1119, 1473, 3357, 4419, 4849, 6383, 14547, 19149, 43641, 57447, 183143, 549429, 1648287, 2380859, 7142577, 21427731]

約数ペア:

[(1, 21427731), (3, 7142577), (9, 2380859), (13, 1648287), (39, 549429), (117, 183143), (373, 57447), (491, 43641), (1119, 19149), (1473, 14547), (3357, 6383), (4419, 4849)]