21660885

素因数分解:

$3^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{571}}^1$

素因数の和:866

約数の個数: 32

約数和(自身を含む): 38712960

約数和(自身を除く): 17052075

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 281, 571, 843, 1405, 1713, 2529, 2855, 4215, 5139, 7587, 8565, 12645, 15417, 25695, 37935, 77085, 160451, 481353, 802255, 1444059, 2406765, 4332177, 7220295, 21660885]

約数ペア:

[(1, 21660885), (3, 7220295), (5, 4332177), (9, 2406765), (15, 1444059), (27, 802255), (45, 481353), (135, 160451), (281, 77085), (571, 37935), (843, 25695), (1405, 15417), (1713, 12645), (2529, 8565), (2855, 7587), (4215, 5139)]