20121293997

素因数分解:

$3^5\times 7^2\times {\mathrm{71}}^1\times {\mathrm{23801}}^1$

素因数の和:23901

約数の個数: 72

約数和(自身を含む): 35556760512

約数和(自身を除く): 15435466515

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 71, 81, 147, 189, 213, 243, 441, 497, 567, 639, 1323, 1491, 1701, 1917, 3479, 3969, 4473, 5751, 10437, 11907, 13419, 17253, 23801, 31311, 40257, 71403, 93933, 120771, 166607, 214209, 281799, 499821, 642627, 845397, 1166249, 1499463, 1689871, 1927881, 3498747, 4498389, 5069613, 5783643, 10496241, 11829097, 13495167, 15208839, 31488723, 35487291, 40485501, 45626517, 82803679, 94466169, 106461873, 136879551, 248411037, 283398507, 319385619, 410638653, 745233111, 958156857, 2235699333, 2874470571, 6707097999, 20121293997]

約数ペア:

[(1, 20121293997), (3, 6707097999), (7, 2874470571), (9, 2235699333), (21, 958156857), (27, 745233111), (49, 410638653), (63, 319385619), (71, 283398507), (81, 248411037), (147, 136879551), (189, 106461873), (213, 94466169), (243, 82803679), (441, 45626517), (497, 40485501), (567, 35487291), (639, 31488723), (1323, 15208839), (1491, 13495167), (1701, 11829097), (1917, 10496241), (3479, 5783643), (3969, 5069613), (4473, 4498389), (5751, 3498747), (10437, 1927881), (11907, 1689871), (13419, 1499463), (17253, 1166249), (23801, 845397), (31311, 642627), (40257, 499821), (71403, 281799), (93933, 214209), (120771, 166607)]