20685645

素因数分解:

$3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{2099}}^1$

素因数の和:2186

約数の個数: 32

約数和(自身を含む): 37296000

約数和(自身を除く): 16610355

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 2099, 3285, 6297, 9855, 10495, 18891, 31485, 56673, 94455, 153227, 283365, 459681, 766135, 1379043, 2298405, 4137129, 6895215, 20685645]

約数ペア:

[(1, 20685645), (3, 6895215), (5, 4137129), (9, 2298405), (15, 1379043), (27, 766135), (45, 459681), (73, 283365), (135, 153227), (219, 94455), (365, 56673), (657, 31485), (1095, 18891), (1971, 10495), (2099, 9855), (3285, 6297)]