19986560

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{167}}^1$

素因数の和:214

約数の個数: 128

約数和(自身を含む): 55520640

約数和(自身を除く): 35534080

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 32, 34, 40, 44, 55, 64, 68, 80, 85, 88, 110, 128, 136, 160, 167, 170, 176, 187, 220, 272, 320, 334, 340, 352, 374, 440, 544, 640, 668, 680, 704, 748, 835, 880, 935, 1088, 1336, 1360, 1408, 1496, 1670, 1760, 1837, 1870, 2176, 2672, 2720, 2839, 2992, 3340, 3520, 3674, 3740, 5344, 5440, 5678, 5984, 6680, 7040, 7348, 7480, 9185, 10688, 10880, 11356, 11968, 13360, 14195, 14696, 14960, 18370, 21376, 22712, 23936, 26720, 28390, 29392, 29920, 31229, 36740, 45424, 53440, 56780, 58784, 59840, 62458, 73480, 90848, 106880, 113560, 117568, 119680, 124916, 146960, 156145, 181696, 227120, 235136, 249832, 293920, 312290, 363392, 454240, 499664, 587840, 624580, 908480, 999328, 1175680, 1249160, 1816960, 1998656, 2498320, 3997312, 4996640, 9993280, 19986560]

約数ペア:

[(1, 19986560), (2, 9993280), (4, 4996640), (5, 3997312), (8, 2498320), (10, 1998656), (11, 1816960), (16, 1249160), (17, 1175680), (20, 999328), (22, 908480), (32, 624580), (34, 587840), (40, 499664), (44, 454240), (55, 363392), (64, 312290), (68, 293920), (80, 249832), (85, 235136), (88, 227120), (110, 181696), (128, 156145), (136, 146960), (160, 124916), (167, 119680), (170, 117568), (176, 113560), (187, 106880), (220, 90848), (272, 73480), (320, 62458), (334, 59840), (340, 58784), (352, 56780), (374, 53440), (440, 45424), (544, 36740), (640, 31229), (668, 29920), (680, 29392), (704, 28390), (748, 26720), (835, 23936), (880, 22712), (935, 21376), (1088, 18370), (1336, 14960), (1360, 14696), (1408, 14195), (1496, 13360), (1670, 11968), (1760, 11356), (1837, 10880), (1870, 10688), (2176, 9185), (2672, 7480), (2720, 7348), (2839, 7040), (2992, 6680), (3340, 5984), (3520, 5678), (3674, 5440), (3740, 5344)]