19919920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 49871808

約数和(自身を除く): 29951888

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 97, 136, 151, 170, 194, 272, 302, 340, 388, 485, 604, 680, 755, 776, 970, 1208, 1360, 1510, 1552, 1649, 1940, 2416, 2567, 3020, 3298, 3880, 5134, 6040, 6596, 7760, 8245, 10268, 12080, 12835, 13192, 14647, 16490, 20536, 25670, 26384, 29294, 32980, 41072, 51340, 58588, 65960, 73235, 102680, 117176, 131920, 146470, 205360, 234352, 248999, 292940, 497998, 585880, 995996, 1171760, 1244995, 1991992, 2489990, 3983984, 4979980, 9959960, 19919920]

約数ペア:

[(1, 19919920), (2, 9959960), (4, 4979980), (5, 3983984), (8, 2489990), (10, 1991992), (16, 1244995), (17, 1171760), (20, 995996), (34, 585880), (40, 497998), (68, 292940), (80, 248999), (85, 234352), (97, 205360), (136, 146470), (151, 131920), (170, 117176), (194, 102680), (272, 73235), (302, 65960), (340, 58588), (388, 51340), (485, 41072), (604, 32980), (680, 29294), (755, 26384), (776, 25670), (970, 20536), (1208, 16490), (1360, 14647), (1510, 13192), (1552, 12835), (1649, 12080), (1940, 10268), (2416, 8245), (2567, 7760), (3020, 6596), (3298, 6040), (3880, 5134)]