19957498561

素因数分解:

$7^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1571}}^1$

素因数の和:1660

約数の個数: 80

約数和(自身を含む): 28109850048

約数和(自身を除く): 8152351487

約数列:

[1, 7, 11, 13, 37, 49, 77, 91, 143, 259, 343, 407, 481, 539, 637, 1001, 1571, 1813, 2401, 2849, 3367, 3773, 4459, 5291, 7007, 10997, 12691, 17281, 19943, 20423, 23569, 26411, 31213, 37037, 49049, 58127, 76979, 88837, 120967, 139601, 142961, 164983, 224653, 259259, 343343, 406889, 538853, 639397, 755651, 846769, 977207, 1000727, 1154881, 1572571, 1814813, 2848223, 3771971, 4475779, 5289557, 5927383, 7005089, 8312161, 11007997, 12703691, 19937561, 31330453, 37026899, 41491681, 49035623, 58185127, 77055979, 139562927, 219313171, 259188293, 407295889, 539391853, 1535192197, 1814318051, 2851071223, 19957498561]

約数ペア:

[(1, 19957498561), (7, 2851071223), (11, 1814318051), (13, 1535192197), (37, 539391853), (49, 407295889), (77, 259188293), (91, 219313171), (143, 139562927), (259, 77055979), (343, 58185127), (407, 49035623), (481, 41491681), (539, 37026899), (637, 31330453), (1001, 19937561), (1571, 12703691), (1813, 11007997), (2401, 8312161), (2849, 7005089), (3367, 5927383), (3773, 5289557), (4459, 4475779), (5291, 3771971), (7007, 2848223), (10997, 1814813), (12691, 1572571), (17281, 1154881), (19943, 1000727), (20423, 977207), (23569, 846769), (26411, 755651), (31213, 639397), (37037, 538853), (49049, 406889), (58127, 343343), (76979, 259259), (88837, 224653), (120967, 164983), (139601, 142961)]