28491687

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{53}}^2$

素因数の和:149

約数の個数: 54

約数和(自身を含む): 50915592

約数和(自身を除く): 22423905

約数列:

[1, 3, 7, 9, 21, 23, 49, 53, 63, 69, 147, 159, 161, 207, 371, 441, 477, 483, 1113, 1127, 1219, 1449, 2597, 2809, 3339, 3381, 3657, 7791, 8427, 8533, 10143, 10971, 19663, 23373, 25281, 25599, 58989, 59731, 64607, 76797, 137641, 176967, 179193, 193821, 412923, 452249, 537579, 581463, 1238769, 1356747, 3165743, 4070241, 9497229, 28491687]

約数ペア:

[(1, 28491687), (3, 9497229), (7, 4070241), (9, 3165743), (21, 1356747), (23, 1238769), (49, 581463), (53, 537579), (63, 452249), (69, 412923), (147, 193821), (159, 179193), (161, 176967), (207, 137641), (371, 76797), (441, 64607), (477, 59731), (483, 58989), (1113, 25599), (1127, 25281), (1219, 23373), (1449, 19663), (2597, 10971), (2809, 10143), (3339, 8533), (3381, 8427), (3657, 7791)]