18287731

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:200

約数の個数: 32

約数和(自身を含む): 24076800

約数和(自身を除く): 5789069

約数列:

[1, 7, 11, 37, 49, 77, 131, 259, 343, 407, 539, 917, 1441, 1813, 2849, 3773, 4847, 6419, 10087, 12691, 19943, 33929, 44933, 53317, 70609, 139601, 237503, 373219, 494263, 1662521, 2612533, 18287731]

約数ペア:

[(1, 18287731), (7, 2612533), (11, 1662521), (37, 494263), (49, 373219), (77, 237503), (131, 139601), (259, 70609), (343, 53317), (407, 44933), (539, 33929), (917, 19943), (1441, 12691), (1813, 10087), (2849, 6419), (3773, 4847)]