20654960

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^2\times {\mathrm{307}}^1$

素因数の和:378

約数の個数: 60

約数和(自身を含む): 49897848

約数和(自身を除く): 29242888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 307, 464, 580, 614, 841, 1160, 1228, 1535, 1682, 2320, 2456, 3070, 3364, 4205, 4912, 6140, 6728, 8410, 8903, 12280, 13456, 16820, 17806, 24560, 33640, 35612, 44515, 67280, 71224, 89030, 142448, 178060, 258187, 356120, 516374, 712240, 1032748, 1290935, 2065496, 2581870, 4130992, 5163740, 10327480, 20654960]

約数ペア:

[(1, 20654960), (2, 10327480), (4, 5163740), (5, 4130992), (8, 2581870), (10, 2065496), (16, 1290935), (20, 1032748), (29, 712240), (40, 516374), (58, 356120), (80, 258187), (116, 178060), (145, 142448), (232, 89030), (290, 71224), (307, 67280), (464, 44515), (580, 35612), (614, 33640), (841, 24560), (1160, 17806), (1228, 16820), (1535, 13456), (1682, 12280), (2320, 8903), (2456, 8410), (3070, 6728), (3364, 6140), (4205, 4912)]