21476080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 53568000

約数和(自身を除く): 32091920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 71, 76, 80, 95, 142, 152, 190, 199, 284, 304, 355, 380, 398, 568, 710, 760, 796, 995, 1136, 1349, 1420, 1520, 1592, 1990, 2698, 2840, 3184, 3781, 3980, 5396, 5680, 6745, 7562, 7960, 10792, 13490, 14129, 15124, 15920, 18905, 21584, 26980, 28258, 30248, 37810, 53960, 56516, 60496, 70645, 75620, 107920, 113032, 141290, 151240, 226064, 268451, 282580, 302480, 536902, 565160, 1073804, 1130320, 1342255, 2147608, 2684510, 4295216, 5369020, 10738040, 21476080]

約数ペア:

[(1, 21476080), (2, 10738040), (4, 5369020), (5, 4295216), (8, 2684510), (10, 2147608), (16, 1342255), (19, 1130320), (20, 1073804), (38, 565160), (40, 536902), (71, 302480), (76, 282580), (80, 268451), (95, 226064), (142, 151240), (152, 141290), (190, 113032), (199, 107920), (284, 75620), (304, 70645), (355, 60496), (380, 56516), (398, 53960), (568, 37810), (710, 30248), (760, 28258), (796, 26980), (995, 21584), (1136, 18905), (1349, 15920), (1420, 15124), (1520, 14129), (1592, 13490), (1990, 10792), (2698, 7960), (2840, 7562), (3184, 6745), (3781, 5680), (3980, 5396)]