20728236

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 52951360

約数和(自身を除く): 32223124

約数列:

[1, 2, 3, 4, 6, 12, 17, 34, 43, 51, 68, 86, 102, 129, 139, 172, 204, 258, 278, 289, 417, 516, 556, 578, 731, 834, 867, 1156, 1462, 1668, 1734, 2193, 2363, 2924, 3468, 4386, 4726, 5977, 7089, 8772, 9452, 11954, 12427, 14178, 17931, 23908, 24854, 28356, 35862, 37281, 40171, 49708, 71724, 74562, 80342, 101609, 120513, 149124, 160684, 203218, 241026, 304827, 406436, 482052, 609654, 1219308, 1727353, 3454706, 5182059, 6909412, 10364118, 20728236]

約数ペア:

[(1, 20728236), (2, 10364118), (3, 6909412), (4, 5182059), (6, 3454706), (12, 1727353), (17, 1219308), (34, 609654), (43, 482052), (51, 406436), (68, 304827), (86, 241026), (102, 203218), (129, 160684), (139, 149124), (172, 120513), (204, 101609), (258, 80342), (278, 74562), (289, 71724), (417, 49708), (516, 40171), (556, 37281), (578, 35862), (731, 28356), (834, 24854), (867, 23908), (1156, 17931), (1462, 14178), (1668, 12427), (1734, 11954), (2193, 9452), (2363, 8772), (2924, 7089), (3468, 5977), (4386, 4726)]