19994920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1567}}^1$

素因数の和:1618

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 30808280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1567, 1595, 2552, 3134, 3190, 6268, 6380, 7835, 12536, 12760, 15670, 17237, 31340, 34474, 45443, 62680, 68948, 86185, 90886, 137896, 172370, 181772, 227215, 344740, 363544, 454430, 499873, 689480, 908860, 999746, 1817720, 1999492, 2499365, 3998984, 4998730, 9997460, 19994920]

約数ペア:

[(1, 19994920), (2, 9997460), (4, 4998730), (5, 3998984), (8, 2499365), (10, 1999492), (11, 1817720), (20, 999746), (22, 908860), (29, 689480), (40, 499873), (44, 454430), (55, 363544), (58, 344740), (88, 227215), (110, 181772), (116, 172370), (145, 137896), (220, 90886), (232, 86185), (290, 68948), (319, 62680), (440, 45443), (580, 34474), (638, 31340), (1160, 17237), (1276, 15670), (1567, 12760), (1595, 12536), (2552, 7835), (3134, 6380), (3190, 6268)]