19975968

素因数分解:

$2^5\times 3^2\times {\mathrm{139}}^1\times {\mathrm{499}}^1$

素因数の和:654

約数の個数: 72

約数和(自身を含む): 57330000

約数和(自身を除く): 37354032

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 139, 144, 278, 288, 417, 499, 556, 834, 998, 1112, 1251, 1497, 1668, 1996, 2224, 2502, 2994, 3336, 3992, 4448, 4491, 5004, 5988, 6672, 7984, 8982, 10008, 11976, 13344, 15968, 17964, 20016, 23952, 35928, 40032, 47904, 69361, 71856, 138722, 143712, 208083, 277444, 416166, 554888, 624249, 832332, 1109776, 1248498, 1664664, 2219552, 2496996, 3329328, 4993992, 6658656, 9987984, 19975968]

約数ペア:

[(1, 19975968), (2, 9987984), (3, 6658656), (4, 4993992), (6, 3329328), (8, 2496996), (9, 2219552), (12, 1664664), (16, 1248498), (18, 1109776), (24, 832332), (32, 624249), (36, 554888), (48, 416166), (72, 277444), (96, 208083), (139, 143712), (144, 138722), (278, 71856), (288, 69361), (417, 47904), (499, 40032), (556, 35928), (834, 23952), (998, 20016), (1112, 17964), (1251, 15968), (1497, 13344), (1668, 11976), (1996, 10008), (2224, 8982), (2502, 7984), (2994, 6672), (3336, 5988), (3992, 5004), (4448, 4491)]