661933780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{409}}^1\times {\mathrm{4259}}^1$

素因数の和:4696

約数の個数: 48

約数和(自身を含む): 1467144000

約数和(自身を除く): 805210220

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 409, 818, 1636, 2045, 4090, 4259, 7771, 8180, 8518, 15542, 17036, 21295, 31084, 38855, 42590, 77710, 80921, 85180, 155420, 161842, 323684, 404605, 809210, 1618420, 1741931, 3483862, 6967724, 8709655, 17419310, 33096689, 34838620, 66193378, 132386756, 165483445, 330966890, 661933780]

約数ペア:

[(1, 661933780), (2, 330966890), (4, 165483445), (5, 132386756), (10, 66193378), (19, 34838620), (20, 33096689), (38, 17419310), (76, 8709655), (95, 6967724), (190, 3483862), (380, 1741931), (409, 1618420), (818, 809210), (1636, 404605), (2045, 323684), (4090, 161842), (4259, 155420), (7771, 85180), (8180, 80921), (8518, 77710), (15542, 42590), (17036, 38855), (21295, 31084)]