9780479920

素因数分解:

$2^4\times 5^1\times {\mathrm{122255999}}^1$

素因数の和:122256012

約数の個数: 20

約数和(自身を含む): 22739616000

約数和(自身を除く): 12959136080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 122255999, 244511998, 489023996, 611279995, 978047992, 1222559990, 1956095984, 2445119980, 4890239960, 9780479920]

約数ペア:

[(1, 9780479920), (2, 4890239960), (4, 2445119980), (5, 1956095984), (8, 1222559990), (10, 978047992), (16, 611279995), (20, 489023996), (40, 244511998), (80, 122255999)]