21187015

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{4703}}^1$

素因数の和:4778

約数の個数: 16

約数和(自身を含む): 27433728

約数和(自身を除く): 6246713

約数列:

[1, 5, 17, 53, 85, 265, 901, 4505, 4703, 23515, 79951, 249259, 399755, 1246295, 4237403, 21187015]

約数ペア:

[(1, 21187015), (5, 4237403), (17, 1246295), (53, 399755), (85, 249259), (265, 79951), (901, 23515), (4505, 4703)]