20725720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1051}}^1$

素因数の和:1108

約数の個数: 64

約数和(自身を含む): 51127200

約数和(自身を除く): 30401480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 29, 34, 40, 58, 68, 85, 116, 136, 145, 170, 232, 290, 340, 493, 580, 680, 986, 1051, 1160, 1972, 2102, 2465, 3944, 4204, 4930, 5255, 8408, 9860, 10510, 17867, 19720, 21020, 30479, 35734, 42040, 60958, 71468, 89335, 121916, 142936, 152395, 178670, 243832, 304790, 357340, 518143, 609580, 714680, 1036286, 1219160, 2072572, 2590715, 4145144, 5181430, 10362860, 20725720]

約数ペア:

[(1, 20725720), (2, 10362860), (4, 5181430), (5, 4145144), (8, 2590715), (10, 2072572), (17, 1219160), (20, 1036286), (29, 714680), (34, 609580), (40, 518143), (58, 357340), (68, 304790), (85, 243832), (116, 178670), (136, 152395), (145, 142936), (170, 121916), (232, 89335), (290, 71468), (340, 60958), (493, 42040), (580, 35734), (680, 30479), (986, 21020), (1051, 19720), (1160, 17867), (1972, 10510), (2102, 9860), (2465, 8408), (3944, 5255), (4204, 4930)]