21419541

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 39213720

約数和(自身を除く): 17794179

約数列:

[1, 3, 9, 11, 13, 17, 33, 39, 51, 89, 99, 117, 121, 143, 153, 187, 221, 267, 363, 429, 561, 663, 801, 979, 1089, 1157, 1287, 1513, 1573, 1683, 1989, 2057, 2431, 2937, 3471, 4539, 4719, 6171, 7293, 8811, 10413, 10769, 12727, 13617, 14157, 16643, 18513, 19669, 21879, 26741, 32307, 38181, 49929, 59007, 80223, 96921, 114543, 139997, 149787, 177021, 183073, 216359, 240669, 419991, 549219, 649077, 1259973, 1647657, 1947231, 2379949, 7139847, 21419541]

約数ペア:

[(1, 21419541), (3, 7139847), (9, 2379949), (11, 1947231), (13, 1647657), (17, 1259973), (33, 649077), (39, 549219), (51, 419991), (89, 240669), (99, 216359), (117, 183073), (121, 177021), (143, 149787), (153, 139997), (187, 114543), (221, 96921), (267, 80223), (363, 59007), (429, 49929), (561, 38181), (663, 32307), (801, 26741), (979, 21879), (1089, 19669), (1157, 18513), (1287, 16643), (1513, 14157), (1573, 13617), (1683, 12727), (1989, 10769), (2057, 10413), (2431, 8811), (2937, 7293), (3471, 6171), (4539, 4719)]