19986216

素因数分解:

$2^3\times 3^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:434

約数の個数: 64

約数和(自身を含む): 52202880

約数和(自身を除く): 32216664

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 37, 71, 74, 111, 142, 148, 213, 222, 284, 296, 317, 426, 444, 568, 634, 852, 888, 951, 1268, 1704, 1902, 2536, 2627, 3804, 5254, 7608, 7881, 10508, 11729, 15762, 21016, 22507, 23458, 31524, 35187, 45014, 46916, 63048, 67521, 70374, 90028, 93832, 135042, 140748, 180056, 270084, 281496, 540168, 832759, 1665518, 2498277, 3331036, 4996554, 6662072, 9993108, 19986216]

約数ペア:

[(1, 19986216), (2, 9993108), (3, 6662072), (4, 4996554), (6, 3331036), (8, 2498277), (12, 1665518), (24, 832759), (37, 540168), (71, 281496), (74, 270084), (111, 180056), (142, 140748), (148, 135042), (213, 93832), (222, 90028), (284, 70374), (296, 67521), (317, 63048), (426, 46916), (444, 45014), (568, 35187), (634, 31524), (852, 23458), (888, 22507), (951, 21016), (1268, 15762), (1704, 11729), (1902, 10508), (2536, 7881), (2627, 7608), (3804, 5254)]