64151980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1\times {\mathrm{421}}^1$

素因数の和:850

約数の個数: 48

約数和(自身を含む): 142500960

約数和(自身を除く): 78348980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 401, 421, 802, 842, 1604, 1684, 2005, 2105, 4010, 4210, 7619, 7999, 8020, 8420, 15238, 15998, 30476, 31996, 38095, 39995, 76190, 79990, 152380, 159980, 168821, 337642, 675284, 844105, 1688210, 3207599, 3376420, 6415198, 12830396, 16037995, 32075990, 64151980]

約数ペア:

[(1, 64151980), (2, 32075990), (4, 16037995), (5, 12830396), (10, 6415198), (19, 3376420), (20, 3207599), (38, 1688210), (76, 844105), (95, 675284), (190, 337642), (380, 168821), (401, 159980), (421, 152380), (802, 79990), (842, 76190), (1604, 39995), (1684, 38095), (2005, 31996), (2105, 30476), (4010, 15998), (4210, 15238), (7619, 8420), (7999, 8020)]