20898423

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:141

約数の個数: 96

約数和(自身を含む): 41932800

約数和(自身を除く): 21034377

約数列:

[1, 3, 7, 9, 13, 17, 19, 21, 39, 51, 57, 63, 79, 91, 117, 119, 133, 153, 171, 221, 237, 247, 273, 323, 357, 399, 553, 663, 711, 741, 819, 969, 1027, 1071, 1197, 1343, 1501, 1547, 1659, 1729, 1989, 2223, 2261, 2907, 3081, 4029, 4199, 4503, 4641, 4977, 5187, 6783, 7189, 9243, 9401, 10507, 12087, 12597, 13509, 13923, 15561, 17459, 19513, 20349, 21567, 25517, 28203, 29393, 31521, 37791, 52377, 58539, 64701, 76551, 84609, 88179, 94563, 122213, 136591, 157131, 175617, 178619, 229653, 264537, 331721, 366639, 409773, 535857, 995163, 1099917, 1229319, 1607571, 2322047, 2985489, 6966141, 20898423]

約数ペア:

[(1, 20898423), (3, 6966141), (7, 2985489), (9, 2322047), (13, 1607571), (17, 1229319), (19, 1099917), (21, 995163), (39, 535857), (51, 409773), (57, 366639), (63, 331721), (79, 264537), (91, 229653), (117, 178619), (119, 175617), (133, 157131), (153, 136591), (171, 122213), (221, 94563), (237, 88179), (247, 84609), (273, 76551), (323, 64701), (357, 58539), (399, 52377), (553, 37791), (663, 31521), (711, 29393), (741, 28203), (819, 25517), (969, 21567), (1027, 20349), (1071, 19513), (1197, 17459), (1343, 15561), (1501, 13923), (1547, 13509), (1659, 12597), (1729, 12087), (1989, 10507), (2223, 9401), (2261, 9243), (2907, 7189), (3081, 6783), (4029, 5187), (4199, 4977), (4503, 4641)]