20974880

素因数分解:

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

素因数の和:741

約数の個数: 48

約数和(自身を含む): 49827960

約数和(自身を除く): 28853080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 337, 389, 674, 778, 1348, 1556, 1685, 1945, 2696, 3112, 3370, 3890, 5392, 6224, 6740, 7780, 10784, 12448, 13480, 15560, 26960, 31120, 53920, 62240, 131093, 262186, 524372, 655465, 1048744, 1310930, 2097488, 2621860, 4194976, 5243720, 10487440, 20974880]

約数ペア:

[(1, 20974880), (2, 10487440), (4, 5243720), (5, 4194976), (8, 2621860), (10, 2097488), (16, 1310930), (20, 1048744), (32, 655465), (40, 524372), (80, 262186), (160, 131093), (337, 62240), (389, 53920), (674, 31120), (778, 26960), (1348, 15560), (1556, 13480), (1685, 12448), (1945, 10784), (2696, 7780), (3112, 6740), (3370, 6224), (3890, 5392)]