21054020589

素因数分解:

$3^2\times 7^1\times {\mathrm{491}}^1\times {\mathrm{680633}}^1$

素因数の和:681137

約数の個数: 24

約数和(自身を含む): 34826680512

約数和(自身を除く): 13772659923

約数列:

[1, 3, 7, 9, 21, 63, 491, 1473, 3437, 4419, 10311, 30933, 680633, 2041899, 4764431, 6125697, 14293293, 42879879, 334190803, 1002572409, 2339335621, 3007717227, 7018006863, 21054020589]

約数ペア:

[(1, 21054020589), (3, 7018006863), (7, 3007717227), (9, 2339335621), (21, 1002572409), (63, 334190803), (491, 42879879), (1473, 14293293), (3437, 6125697), (4419, 4764431), (10311, 2041899), (30933, 680633)]