28405040

素因数分解:

$2^4\times 5^1\times {\mathrm{355063}}^1$

素因数の和:355076

約数の個数: 20

約数和(自身を含む): 66041904

約数和(自身を除く): 37636864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355063, 710126, 1420252, 1775315, 2840504, 3550630, 5681008, 7101260, 14202520, 28405040]

約数ペア:

[(1, 28405040), (2, 14202520), (4, 7101260), (5, 5681008), (8, 3550630), (10, 2840504), (16, 1775315), (20, 1420252), (40, 710126), (80, 355063)]