21185415

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6823}}^1$

素因数の和:6860

約数の個数: 32

約数和(自身を含む): 39306240

約数和(自身を除く): 18120825

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6823, 20469, 34115, 61407, 102345, 156929, 184221, 307035, 470787, 784645, 921105, 1412361, 2353935, 4237083, 7061805, 21185415]

約数ペア:

[(1, 21185415), (3, 7061805), (5, 4237083), (9, 2353935), (15, 1412361), (23, 921105), (27, 784645), (45, 470787), (69, 307035), (115, 184221), (135, 156929), (207, 102345), (345, 61407), (621, 34115), (1035, 20469), (3105, 6823)]