21249865

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{46703}}^1$

素因数の和:46728

約数の個数: 16

約数和(自身を含む): 31385088

約数和(自身を除く): 10135223

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 46703, 233515, 326921, 607139, 1634605, 3035695, 4249973, 21249865]

約数ペア:

[(1, 21249865), (5, 4249973), (7, 3035695), (13, 1634605), (35, 607139), (65, 326921), (91, 233515), (455, 46703)]