19885720

素因数分解:

$2^3\times 5^1\times {\mathrm{613}}^1\times {\mathrm{811}}^1$

素因数の和:1435

約数の個数: 32

約数和(自身を含む): 44871120

約数和(自身を除く): 24985400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 613, 811, 1226, 1622, 2452, 3065, 3244, 4055, 4904, 6130, 6488, 8110, 12260, 16220, 24520, 32440, 497143, 994286, 1988572, 2485715, 3977144, 4971430, 9942860, 19885720]

約数ペア:

[(1, 19885720), (2, 9942860), (4, 4971430), (5, 3977144), (8, 2485715), (10, 1988572), (20, 994286), (40, 497143), (613, 32440), (811, 24520), (1226, 16220), (1622, 12260), (2452, 8110), (3065, 6488), (3244, 6130), (4055, 4904)]