78617980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1373}}^1$

素因数の和:1798

約数の個数: 48

約数和(自身を含む): 189282240

約数和(自身を除く): 110664260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 409, 818, 1373, 1636, 2045, 2746, 2863, 4090, 5492, 5726, 6865, 8180, 9611, 11452, 13730, 14315, 19222, 27460, 28630, 38444, 48055, 57260, 96110, 192220, 561557, 1123114, 2246228, 2807785, 3930899, 5615570, 7861798, 11231140, 15723596, 19654495, 39308990, 78617980]

約数ペア:

[(1, 78617980), (2, 39308990), (4, 19654495), (5, 15723596), (7, 11231140), (10, 7861798), (14, 5615570), (20, 3930899), (28, 2807785), (35, 2246228), (70, 1123114), (140, 561557), (409, 192220), (818, 96110), (1373, 57260), (1636, 48055), (2045, 38444), (2746, 28630), (2863, 27460), (4090, 19222), (5492, 14315), (5726, 13730), (6865, 11452), (8180, 9611)]