20909875

素因数分解:

$5^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1039}}^1$

素因数の和:1084

約数の個数: 32

約数和(自身を含む): 31150080

約数和(自身を除く): 10240205

約数列:

[1, 5, 7, 23, 25, 35, 115, 125, 161, 175, 575, 805, 875, 1039, 2875, 4025, 5195, 7273, 20125, 23897, 25975, 36365, 119485, 129875, 167279, 181825, 597425, 836395, 909125, 2987125, 4181975, 20909875]

約数ペア:

[(1, 20909875), (5, 4181975), (7, 2987125), (23, 909125), (25, 836395), (35, 597425), (115, 181825), (125, 167279), (161, 129875), (175, 119485), (575, 36365), (805, 25975), (875, 23897), (1039, 20125), (2875, 7273), (4025, 5195)]