21661515

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20929}}^1$

素因数の和:20963

約数の個数: 24

約数和(自身を含む): 39180960

約数和(自身を除く): 17519445

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20929, 62787, 104645, 188361, 313935, 481367, 941805, 1444101, 2406835, 4332303, 7220505, 21661515]

約数ペア:

[(1, 21661515), (3, 7220505), (5, 4332303), (9, 2406835), (15, 1444101), (23, 941805), (45, 481367), (69, 313935), (115, 188361), (207, 104645), (345, 62787), (1035, 20929)]