21247605

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{24851}}^1$

素因数の和:24881

約数の個数: 24

約数和(自身を含む): 38769120

約数和(自身を除く): 17521515

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 24851, 74553, 124255, 223659, 372765, 472169, 1118295, 1416507, 2360845, 4249521, 7082535, 21247605]

約数ペア:

[(1, 21247605), (3, 7082535), (5, 4249521), (9, 2360845), (15, 1416507), (19, 1118295), (45, 472169), (57, 372765), (95, 223659), (171, 124255), (285, 74553), (855, 24851)]