21668715

素因数分解:

$3^4\times 5^1\times {\mathrm{53503}}^1$

素因数の和:53520

約数の個数: 20

約数和(自身を含む): 38843904

約数和(自身を除く): 17175189

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53503, 160509, 267515, 481527, 802545, 1444581, 2407635, 4333743, 7222905, 21668715]

約数ペア:

[(1, 21668715), (3, 7222905), (5, 4333743), (9, 2407635), (15, 1444581), (27, 802545), (45, 481527), (81, 267515), (135, 160509), (405, 53503)]