19994660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{569}}^1$

素因数の和:836

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 28268380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 569, 1004, 1138, 1255, 1757, 2276, 2510, 2845, 3514, 3983, 5020, 5690, 7028, 7966, 8785, 11380, 15932, 17570, 19915, 35140, 39830, 79660, 142819, 285638, 571276, 714095, 999733, 1428190, 1999466, 2856380, 3998932, 4998665, 9997330, 19994660]

約数ペア:

[(1, 19994660), (2, 9997330), (4, 4998665), (5, 3998932), (7, 2856380), (10, 1999466), (14, 1428190), (20, 999733), (28, 714095), (35, 571276), (70, 285638), (140, 142819), (251, 79660), (502, 39830), (569, 35140), (1004, 19915), (1138, 17570), (1255, 15932), (1757, 11380), (2276, 8785), (2510, 7966), (2845, 7028), (3514, 5690), (3983, 5020)]