21178145

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{719}}^1$

素因数の和:904

約数の個数: 16

約数和(自身を含む): 26231040

約数和(自身を除く): 5052895

約数列:

[1, 5, 43, 137, 215, 685, 719, 3595, 5891, 29455, 30917, 98503, 154585, 492515, 4235629, 21178145]

約数ペア:

[(1, 21178145), (5, 4235629), (43, 492515), (137, 154585), (215, 98503), (685, 30917), (719, 29455), (3595, 5891)]