20916220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80447}}^1$

素因数の和:80469

約数の個数: 24

約数和(自身を含む): 47303424

約数和(自身を除く): 26387204

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80447, 160894, 321788, 402235, 804470, 1045811, 1608940, 2091622, 4183244, 5229055, 10458110, 20916220]

約数ペア:

[(1, 20916220), (2, 10458110), (4, 5229055), (5, 4183244), (10, 2091622), (13, 1608940), (20, 1045811), (26, 804470), (52, 402235), (65, 321788), (130, 160894), (260, 80447)]