21961665

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{643}}^1$

素因数の和:691

約数の個数: 64

約数和(自身を含む): 44513280

約数和(自身を除く): 22551615

約数列:

[1, 3, 5, 9, 11, 15, 23, 27, 33, 45, 55, 69, 99, 115, 135, 165, 207, 253, 297, 345, 495, 621, 643, 759, 1035, 1265, 1485, 1929, 2277, 3105, 3215, 3795, 5787, 6831, 7073, 9645, 11385, 14789, 17361, 21219, 28935, 34155, 35365, 44367, 63657, 73945, 86805, 106095, 133101, 162679, 190971, 221835, 318285, 399303, 488037, 665505, 813395, 954855, 1464111, 1996515, 2440185, 4392333, 7320555, 21961665]

約数ペア:

[(1, 21961665), (3, 7320555), (5, 4392333), (9, 2440185), (11, 1996515), (15, 1464111), (23, 954855), (27, 813395), (33, 665505), (45, 488037), (55, 399303), (69, 318285), (99, 221835), (115, 190971), (135, 162679), (165, 133101), (207, 106095), (253, 86805), (297, 73945), (345, 63657), (495, 44367), (621, 35365), (643, 34155), (759, 28935), (1035, 21219), (1265, 17361), (1485, 14789), (1929, 11385), (2277, 9645), (3105, 7073), (3215, 6831), (3795, 5787)]