28172991

素因数分解:

$3^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:185

約数の個数: 64

約数和(自身を含む): 50688000

約数和(自身を除く): 22515009

約数列:

[1, 3, 7, 11, 19, 21, 33, 49, 57, 77, 131, 133, 147, 209, 231, 343, 393, 399, 539, 627, 917, 931, 1029, 1441, 1463, 1617, 2489, 2751, 2793, 3773, 4323, 4389, 6419, 6517, 7467, 10087, 10241, 11319, 17423, 19257, 19551, 27379, 30261, 30723, 44933, 52269, 70609, 71687, 82137, 121961, 134799, 191653, 211827, 215061, 365883, 494263, 574959, 853727, 1341571, 1482789, 2561181, 4024713, 9390997, 28172991]

約数ペア:

[(1, 28172991), (3, 9390997), (7, 4024713), (11, 2561181), (19, 1482789), (21, 1341571), (33, 853727), (49, 574959), (57, 494263), (77, 365883), (131, 215061), (133, 211827), (147, 191653), (209, 134799), (231, 121961), (343, 82137), (393, 71687), (399, 70609), (539, 52269), (627, 44933), (917, 30723), (931, 30261), (1029, 27379), (1441, 19551), (1463, 19257), (1617, 17423), (2489, 11319), (2751, 10241), (2793, 10087), (3773, 7467), (4323, 6517), (4389, 6419)]