661325780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{17231}}^1$

素因数の和:17360

約数の個数: 48

約数和(自身を含む): 1476437760

約数和(自身を除く): 815111980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 101, 190, 202, 380, 404, 505, 1010, 1919, 2020, 3838, 7676, 9595, 17231, 19190, 34462, 38380, 68924, 86155, 172310, 327389, 344620, 654778, 1309556, 1636945, 1740331, 3273890, 3480662, 6547780, 6961324, 8701655, 17403310, 33066289, 34806620, 66132578, 132265156, 165331445, 330662890, 661325780]

約数ペア:

[(1, 661325780), (2, 330662890), (4, 165331445), (5, 132265156), (10, 66132578), (19, 34806620), (20, 33066289), (38, 17403310), (76, 8701655), (95, 6961324), (101, 6547780), (190, 3480662), (202, 3273890), (380, 1740331), (404, 1636945), (505, 1309556), (1010, 654778), (1919, 344620), (2020, 327389), (3838, 172310), (7676, 86155), (9595, 68924), (17231, 38380), (19190, 34462)]