978012920

素因数分解:

$2^3\times 5^1\times {\mathrm{1399}}^1\times {\mathrm{17477}}^1$

素因数の和:18887

約数の個数: 32

約数和(自身を含む): 2202228000

約数和(自身を除く): 1224215080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1399, 2798, 5596, 6995, 11192, 13990, 17477, 27980, 34954, 55960, 69908, 87385, 139816, 174770, 349540, 699080, 24450323, 48900646, 97801292, 122251615, 195602584, 244503230, 489006460, 978012920]

約数ペア:

[(1, 978012920), (2, 489006460), (4, 244503230), (5, 195602584), (8, 122251615), (10, 97801292), (20, 48900646), (40, 24450323), (1399, 699080), (2798, 349540), (5596, 174770), (6995, 139816), (11192, 87385), (13990, 69908), (17477, 55960), (27980, 34954)]