21972705

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{63689}}^1$

素因数の和:63720

約数の個数: 16

約数和(自身を含む): 36685440

約数和(自身を除く): 14712735

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 63689, 191067, 318445, 955335, 1464847, 4394541, 7324235, 21972705]

約数ペア:

[(1, 21972705), (3, 7324235), (5, 4394541), (15, 1464847), (23, 955335), (69, 318445), (115, 191067), (345, 63689)]