20658555

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17080965

約数列:

[1, 3, 5, 9, 15, 31, 45, 59, 93, 155, 177, 251, 279, 295, 465, 531, 753, 885, 1255, 1395, 1829, 2259, 2655, 3765, 5487, 7781, 9145, 11295, 14809, 16461, 23343, 27435, 38905, 44427, 70029, 74045, 82305, 116715, 133281, 222135, 350145, 459079, 666405, 1377237, 2295395, 4131711, 6886185, 20658555]

約数ペア:

[(1, 20658555), (3, 6886185), (5, 4131711), (9, 2295395), (15, 1377237), (31, 666405), (45, 459079), (59, 350145), (93, 222135), (155, 133281), (177, 116715), (251, 82305), (279, 74045), (295, 70029), (465, 44427), (531, 38905), (753, 27435), (885, 23343), (1255, 16461), (1395, 14809), (1829, 11295), (2259, 9145), (2655, 7781), (3765, 5487)]