21282705

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20563}}^1$

素因数の和:20597

約数の個数: 24

約数和(自身を含む): 38495808

約数和(自身を除く): 17213103

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20563, 61689, 102815, 185067, 308445, 472949, 925335, 1418847, 2364745, 4256541, 7094235, 21282705]

約数ペア:

[(1, 21282705), (3, 7094235), (5, 4256541), (9, 2364745), (15, 1418847), (23, 925335), (45, 472949), (69, 308445), (115, 185067), (207, 102815), (345, 61689), (1035, 20563)]