20856285

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2239}}^1$

素因数の和:2279

約数の個数: 40

約数和(自身を含む): 39029760

約数和(自身を除く): 18173475

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 2239, 3105, 6717, 9315, 11195, 20151, 33585, 51497, 60453, 100755, 154491, 181359, 257485, 302265, 463473, 772455, 906795, 1390419, 2317365, 4171257, 6952095, 20856285]

約数ペア:

[(1, 20856285), (3, 6952095), (5, 4171257), (9, 2317365), (15, 1390419), (23, 906795), (27, 772455), (45, 463473), (69, 302265), (81, 257485), (115, 181359), (135, 154491), (207, 100755), (345, 60453), (405, 51497), (621, 33585), (1035, 20151), (1863, 11195), (2239, 9315), (3105, 6717)]