19806160

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 51103872

約数和(自身を除く): 31297712

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 317, 355, 440, 568, 634, 710, 781, 880, 1136, 1268, 1420, 1562, 1585, 2536, 2840, 3124, 3170, 3487, 3905, 5072, 5680, 6248, 6340, 6974, 7810, 12496, 12680, 13948, 15620, 17435, 22507, 25360, 27896, 31240, 34870, 45014, 55792, 62480, 69740, 90028, 112535, 139480, 180056, 225070, 247577, 278960, 360112, 450140, 495154, 900280, 990308, 1237885, 1800560, 1980616, 2475770, 3961232, 4951540, 9903080, 19806160]

約数ペア:

[(1, 19806160), (2, 9903080), (4, 4951540), (5, 3961232), (8, 2475770), (10, 1980616), (11, 1800560), (16, 1237885), (20, 990308), (22, 900280), (40, 495154), (44, 450140), (55, 360112), (71, 278960), (80, 247577), (88, 225070), (110, 180056), (142, 139480), (176, 112535), (220, 90028), (284, 69740), (317, 62480), (355, 55792), (440, 45014), (568, 34870), (634, 31240), (710, 27896), (781, 25360), (880, 22507), (1136, 17435), (1268, 15620), (1420, 13948), (1562, 12680), (1585, 12496), (2536, 7810), (2840, 6974), (3124, 6340), (3170, 6248), (3487, 5680), (3905, 5072)]