820642180

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{337}}^1\times {\mathrm{389}}^1$

素因数の和:1048

約数の個数: 48

約数和(自身を含む): 1738442160

約数和(自身を除く): 917799980

約数列:

[1, 2, 4, 5, 10, 20, 313, 337, 389, 626, 674, 778, 1252, 1348, 1556, 1565, 1685, 1945, 3130, 3370, 3890, 6260, 6740, 7780, 105481, 121757, 131093, 210962, 243514, 262186, 421924, 487028, 524372, 527405, 608785, 655465, 1054810, 1217570, 1310930, 2109620, 2435140, 2621860, 41032109, 82064218, 164128436, 205160545, 410321090, 820642180]

約数ペア:

[(1, 820642180), (2, 410321090), (4, 205160545), (5, 164128436), (10, 82064218), (20, 41032109), (313, 2621860), (337, 2435140), (389, 2109620), (626, 1310930), (674, 1217570), (778, 1054810), (1252, 655465), (1348, 608785), (1556, 527405), (1565, 524372), (1685, 487028), (1945, 421924), (3130, 262186), (3370, 243514), (3890, 210962), (6260, 131093), (6740, 121757), (7780, 105481)]