18781994

素因数分解:

$2^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:184

約数の個数: 64

約数和(自身を含む): 38016000

約数和(自身を除く): 19234006

約数列:

[1, 2, 7, 11, 14, 19, 22, 38, 49, 77, 98, 131, 133, 154, 209, 262, 266, 343, 418, 539, 686, 917, 931, 1078, 1441, 1463, 1834, 1862, 2489, 2882, 2926, 3773, 4978, 6419, 6517, 7546, 10087, 10241, 12838, 13034, 17423, 20174, 20482, 27379, 34846, 44933, 54758, 70609, 71687, 89866, 121961, 141218, 143374, 191653, 243922, 383306, 494263, 853727, 988526, 1341571, 1707454, 2683142, 9390997, 18781994]

約数ペア:

[(1, 18781994), (2, 9390997), (7, 2683142), (11, 1707454), (14, 1341571), (19, 988526), (22, 853727), (38, 494263), (49, 383306), (77, 243922), (98, 191653), (131, 143374), (133, 141218), (154, 121961), (209, 89866), (262, 71687), (266, 70609), (343, 54758), (418, 44933), (539, 34846), (686, 27379), (917, 20482), (931, 20174), (1078, 17423), (1441, 13034), (1463, 12838), (1834, 10241), (1862, 10087), (2489, 7546), (2882, 6517), (2926, 6419), (3773, 4978)]