80420390

素因数分解:

$2^1\times 5^1\times {\mathrm{449}}^1\times {\mathrm{17911}}^1$

素因数の和:18367

約数の個数: 16

約数和(自身を含む): 145087200

約数和(自身を除く): 64666810

約数列:

[1, 2, 5, 10, 449, 898, 2245, 4490, 17911, 35822, 89555, 179110, 8042039, 16084078, 40210195, 80420390]

約数ペア:

[(1, 80420390), (2, 40210195), (5, 16084078), (10, 8042039), (449, 179110), (898, 89555), (2245, 35822), (4490, 17911)]