21306990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1789}}^1$

素因数の和:2196

約数の個数: 32

約数和(自身を含む): 51294240

約数和(自身を除く): 29987250

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 397, 794, 1191, 1789, 1985, 2382, 3578, 3970, 5367, 5955, 8945, 10734, 11910, 17890, 26835, 53670, 710233, 1420466, 2130699, 3551165, 4261398, 7102330, 10653495, 21306990]

約数ペア:

[(1, 21306990), (2, 10653495), (3, 7102330), (5, 4261398), (6, 3551165), (10, 2130699), (15, 1420466), (30, 710233), (397, 53670), (794, 26835), (1191, 17890), (1789, 11910), (1985, 10734), (2382, 8945), (3578, 5955), (3970, 5367)]