20659760

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1381}}^1$

素因数の和:1422

約数の個数: 80

約数和(自身を含む): 55523232

約数和(自身を除く): 34863472

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 68, 80, 85, 88, 110, 136, 170, 176, 187, 220, 272, 340, 374, 440, 680, 748, 880, 935, 1360, 1381, 1496, 1870, 2762, 2992, 3740, 5524, 6905, 7480, 11048, 13810, 14960, 15191, 22096, 23477, 27620, 30382, 46954, 55240, 60764, 75955, 93908, 110480, 117385, 121528, 151910, 187816, 234770, 243056, 258247, 303820, 375632, 469540, 516494, 607640, 939080, 1032988, 1215280, 1291235, 1878160, 2065976, 2582470, 4131952, 5164940, 10329880, 20659760]

約数ペア:

[(1, 20659760), (2, 10329880), (4, 5164940), (5, 4131952), (8, 2582470), (10, 2065976), (11, 1878160), (16, 1291235), (17, 1215280), (20, 1032988), (22, 939080), (34, 607640), (40, 516494), (44, 469540), (55, 375632), (68, 303820), (80, 258247), (85, 243056), (88, 234770), (110, 187816), (136, 151910), (170, 121528), (176, 117385), (187, 110480), (220, 93908), (272, 75955), (340, 60764), (374, 55240), (440, 46954), (680, 30382), (748, 27620), (880, 23477), (935, 22096), (1360, 15191), (1381, 14960), (1496, 13810), (1870, 11048), (2762, 7480), (2992, 6905), (3740, 5524)]