21254505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4903}}^1$

素因数の和:4945

約数の個数: 24

約数和(自身を含む): 36132672

約数和(自身を除く): 14878167

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 289, 867, 1445, 4335, 4903, 14709, 24515, 73545, 83351, 250053, 416755, 1250265, 1416967, 4250901, 7084835, 21254505]

約数ペア:

[(1, 21254505), (3, 7084835), (5, 4250901), (15, 1416967), (17, 1250265), (51, 416755), (85, 250053), (255, 83351), (289, 73545), (867, 24515), (1445, 14709), (4335, 4903)]