81972080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{271}}^1$

素因数の和:502

約数の個数: 80

約数和(自身を含む): 202368000

約数和(自身を除く): 120395920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 199, 271, 304, 380, 398, 542, 760, 796, 995, 1084, 1355, 1520, 1592, 1990, 2168, 2710, 3184, 3781, 3980, 4336, 5149, 5420, 7562, 7960, 10298, 10840, 15124, 15920, 18905, 20596, 21680, 25745, 30248, 37810, 41192, 51490, 53929, 60496, 75620, 82384, 102980, 107858, 151240, 205960, 215716, 269645, 302480, 411920, 431432, 539290, 862864, 1024651, 1078580, 2049302, 2157160, 4098604, 4314320, 5123255, 8197208, 10246510, 16394416, 20493020, 40986040, 81972080]

約数ペア:

[(1, 81972080), (2, 40986040), (4, 20493020), (5, 16394416), (8, 10246510), (10, 8197208), (16, 5123255), (19, 4314320), (20, 4098604), (38, 2157160), (40, 2049302), (76, 1078580), (80, 1024651), (95, 862864), (152, 539290), (190, 431432), (199, 411920), (271, 302480), (304, 269645), (380, 215716), (398, 205960), (542, 151240), (760, 107858), (796, 102980), (995, 82384), (1084, 75620), (1355, 60496), (1520, 53929), (1592, 51490), (1990, 41192), (2168, 37810), (2710, 30248), (3184, 25745), (3781, 21680), (3980, 20596), (4336, 18905), (5149, 15920), (5420, 15124), (7562, 10840), (7960, 10298)]