128749985

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 204664320

約数和(自身を除く): 75914335

約数列:

[1, 5, 7, 13, 19, 35, 53, 65, 91, 95, 133, 247, 265, 281, 371, 455, 665, 689, 1007, 1235, 1405, 1729, 1855, 1967, 3445, 3653, 4823, 5035, 5339, 7049, 8645, 9835, 13091, 14893, 18265, 24115, 25571, 26695, 35245, 37373, 65455, 69407, 74465, 91637, 104251, 127855, 186865, 193609, 282967, 347035, 458185, 485849, 521255, 968045, 1355263, 1414835, 1980769, 2429245, 3678571, 6776315, 9903845, 18392855, 25749997, 128749985]

約数ペア:

[(1, 128749985), (5, 25749997), (7, 18392855), (13, 9903845), (19, 6776315), (35, 3678571), (53, 2429245), (65, 1980769), (91, 1414835), (95, 1355263), (133, 968045), (247, 521255), (265, 485849), (281, 458185), (371, 347035), (455, 282967), (665, 193609), (689, 186865), (1007, 127855), (1235, 104251), (1405, 91637), (1729, 74465), (1855, 69407), (1967, 65455), (3445, 37373), (3653, 35245), (4823, 26695), (5035, 25571), (5339, 24115), (7049, 18265), (8645, 14893), (9835, 13091)]