20408560

素因数分解:

$2^4\times 5^1\times {\mathrm{255107}}^1$

素因数の和:255120

約数の個数: 20

約数和(自身を含む): 47450088

約数和(自身を除く): 27041528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255107, 510214, 1020428, 1275535, 2040856, 2551070, 4081712, 5102140, 10204280, 20408560]

約数ペア:

[(1, 20408560), (2, 10204280), (4, 5102140), (5, 4081712), (8, 2551070), (10, 2040856), (16, 1275535), (20, 1020428), (40, 510214), (80, 255107)]