19977520

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:230

約数の個数: 80

約数和(自身を含む): 49104000

約数和(自身を除く): 29126480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 79, 80, 109, 116, 145, 158, 218, 232, 290, 316, 395, 436, 464, 545, 580, 632, 790, 872, 1090, 1160, 1264, 1580, 1744, 2180, 2291, 2320, 3160, 3161, 4360, 4582, 6320, 6322, 8611, 8720, 9164, 11455, 12644, 15805, 17222, 18328, 22910, 25288, 31610, 34444, 36656, 43055, 45820, 50576, 63220, 68888, 86110, 91640, 126440, 137776, 172220, 183280, 249719, 252880, 344440, 499438, 688880, 998876, 1248595, 1997752, 2497190, 3995504, 4994380, 9988760, 19977520]

約数ペア:

[(1, 19977520), (2, 9988760), (4, 4994380), (5, 3995504), (8, 2497190), (10, 1997752), (16, 1248595), (20, 998876), (29, 688880), (40, 499438), (58, 344440), (79, 252880), (80, 249719), (109, 183280), (116, 172220), (145, 137776), (158, 126440), (218, 91640), (232, 86110), (290, 68888), (316, 63220), (395, 50576), (436, 45820), (464, 43055), (545, 36656), (580, 34444), (632, 31610), (790, 25288), (872, 22910), (1090, 18328), (1160, 17222), (1264, 15805), (1580, 12644), (1744, 11455), (2180, 9164), (2291, 8720), (2320, 8611), (3160, 6322), (3161, 6320), (4360, 4582)]