21506095

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{821}}^1$

素因数の和:883

約数の個数: 24

約数和(自身を含む): 28881792

約数和(自身を除く): 7375697

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 821, 845, 2015, 4105, 5239, 10673, 25451, 26195, 53365, 127255, 138749, 330863, 693745, 1654315, 4301219, 21506095]

約数ペア:

[(1, 21506095), (5, 4301219), (13, 1654315), (31, 693745), (65, 330863), (155, 138749), (169, 127255), (403, 53365), (821, 26195), (845, 25451), (2015, 10673), (4105, 5239)]