20685680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{439}}^1$

素因数の和:502

約数の個数: 80

約数和(自身を含む): 52377600

約数和(自身を除く): 31691920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 38, 40, 62, 76, 80, 95, 124, 152, 155, 190, 248, 304, 310, 380, 439, 496, 589, 620, 760, 878, 1178, 1240, 1520, 1756, 2195, 2356, 2480, 2945, 3512, 4390, 4712, 5890, 7024, 8341, 8780, 9424, 11780, 13609, 16682, 17560, 23560, 27218, 33364, 35120, 41705, 47120, 54436, 66728, 68045, 83410, 108872, 133456, 136090, 166820, 217744, 258571, 272180, 333640, 517142, 544360, 667280, 1034284, 1088720, 1292855, 2068568, 2585710, 4137136, 5171420, 10342840, 20685680]

約数ペア:

[(1, 20685680), (2, 10342840), (4, 5171420), (5, 4137136), (8, 2585710), (10, 2068568), (16, 1292855), (19, 1088720), (20, 1034284), (31, 667280), (38, 544360), (40, 517142), (62, 333640), (76, 272180), (80, 258571), (95, 217744), (124, 166820), (152, 136090), (155, 133456), (190, 108872), (248, 83410), (304, 68045), (310, 66728), (380, 54436), (439, 47120), (496, 41705), (589, 35120), (620, 33364), (760, 27218), (878, 23560), (1178, 17560), (1240, 16682), (1520, 13609), (1756, 11780), (2195, 9424), (2356, 8780), (2480, 8341), (2945, 7024), (3512, 5890), (4390, 4712)]