19901300

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{2803}}^1$

素因数の和:2888

約数の個数: 36

約数和(自身を含む): 43809696

約数和(自身を除く): 23908396

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 142, 284, 355, 710, 1420, 1775, 2803, 3550, 5606, 7100, 11212, 14015, 28030, 56060, 70075, 140150, 199013, 280300, 398026, 796052, 995065, 1990130, 3980260, 4975325, 9950650, 19901300]

約数ペア:

[(1, 19901300), (2, 9950650), (4, 4975325), (5, 3980260), (10, 1990130), (20, 995065), (25, 796052), (50, 398026), (71, 280300), (100, 199013), (142, 140150), (284, 70075), (355, 56060), (710, 28030), (1420, 14015), (1775, 11212), (2803, 7100), (3550, 5606)]