28126539

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 51217920

約数和(自身を除く): 23091381

約数列:

[1, 3, 7, 9, 21, 23, 47, 49, 59, 63, 69, 141, 147, 161, 177, 207, 329, 413, 423, 441, 483, 531, 987, 1081, 1127, 1239, 1357, 1449, 2303, 2773, 2891, 2961, 3243, 3381, 3717, 4071, 6909, 7567, 8319, 8673, 9499, 9729, 10143, 12213, 19411, 20727, 22701, 24957, 26019, 28497, 52969, 58233, 63779, 66493, 68103, 85491, 135877, 158907, 174699, 191337, 199479, 407631, 446453, 476721, 574011, 598437, 1222893, 1339359, 3125171, 4018077, 9375513, 28126539]

約数ペア:

[(1, 28126539), (3, 9375513), (7, 4018077), (9, 3125171), (21, 1339359), (23, 1222893), (47, 598437), (49, 574011), (59, 476721), (63, 446453), (69, 407631), (141, 199479), (147, 191337), (161, 174699), (177, 158907), (207, 135877), (329, 85491), (413, 68103), (423, 66493), (441, 63779), (483, 58233), (531, 52969), (987, 28497), (1081, 26019), (1127, 24957), (1239, 22701), (1357, 20727), (1449, 19411), (2303, 12213), (2773, 10143), (2891, 9729), (2961, 9499), (3243, 8673), (3381, 8319), (3717, 7567), (4071, 6909)]