64990040

素因数分解:

$2^3\times 5^1\times {\mathrm{977}}^1\times {\mathrm{1663}}^1$

素因数の和:2651

約数の個数: 32

約数和(自身を含む): 146465280

約数和(自身を除く): 81475240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 977, 1663, 1954, 3326, 3908, 4885, 6652, 7816, 8315, 9770, 13304, 16630, 19540, 33260, 39080, 66520, 1624751, 3249502, 6499004, 8123755, 12998008, 16247510, 32495020, 64990040]

約数ペア:

[(1, 64990040), (2, 32495020), (4, 16247510), (5, 12998008), (8, 8123755), (10, 6499004), (20, 3249502), (40, 1624751), (977, 66520), (1663, 39080), (1954, 33260), (3326, 19540), (3908, 16630), (4885, 13304), (6652, 9770), (7816, 8315)]