20387505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4703}}^1$

素因数の和:4745

約数の個数: 24

約数和(自身を含む): 34659072

約数和(自身を除く): 14271567

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 289, 867, 1445, 4335, 4703, 14109, 23515, 70545, 79951, 239853, 399755, 1199265, 1359167, 4077501, 6795835, 20387505]

約数ペア:

[(1, 20387505), (3, 6795835), (5, 4077501), (15, 1359167), (17, 1199265), (51, 399755), (85, 239853), (255, 79951), (289, 70545), (867, 23515), (1445, 14109), (4335, 4703)]