21878865

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21139}}^1$

素因数の和:21173

約数の個数: 24

約数和(自身を含む): 39574080

約数和(自身を除く): 17695215

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 21139, 63417, 105695, 190251, 317085, 486197, 951255, 1458591, 2430985, 4375773, 7292955, 21878865]

約数ペア:

[(1, 21878865), (3, 7292955), (5, 4375773), (9, 2430985), (15, 1458591), (23, 951255), (45, 486197), (69, 317085), (115, 190251), (207, 105695), (345, 63417), (1035, 21139)]