18708760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{613}}^1$

素因数の和:740

約数の個数: 64

約数和(自身を含む): 48628800

約数和(自身を除く): 29920040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 613, 763, 872, 1090, 1226, 1526, 2180, 2452, 3052, 3065, 3815, 4291, 4360, 4904, 6104, 6130, 7630, 8582, 12260, 15260, 17164, 21455, 24520, 30520, 34328, 42910, 66817, 85820, 133634, 171640, 267268, 334085, 467719, 534536, 668170, 935438, 1336340, 1870876, 2338595, 2672680, 3741752, 4677190, 9354380, 18708760]

約数ペア:

[(1, 18708760), (2, 9354380), (4, 4677190), (5, 3741752), (7, 2672680), (8, 2338595), (10, 1870876), (14, 1336340), (20, 935438), (28, 668170), (35, 534536), (40, 467719), (56, 334085), (70, 267268), (109, 171640), (140, 133634), (218, 85820), (280, 66817), (436, 42910), (545, 34328), (613, 30520), (763, 24520), (872, 21455), (1090, 17164), (1226, 15260), (1526, 12260), (2180, 8582), (2452, 7630), (3052, 6130), (3065, 6104), (3815, 4904), (4291, 4360)]