21516080

素因数分解:

$2^4\times 5^1\times {\mathrm{449}}^1\times {\mathrm{599}}^1$

素因数の和:1061

約数の個数: 40

約数和(自身を含む): 50220000

約数和(自身を除く): 28703920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 449, 599, 898, 1198, 1796, 2245, 2396, 2995, 3592, 4490, 4792, 5990, 7184, 8980, 9584, 11980, 17960, 23960, 35920, 47920, 268951, 537902, 1075804, 1344755, 2151608, 2689510, 4303216, 5379020, 10758040, 21516080]

約数ペア:

[(1, 21516080), (2, 10758040), (4, 5379020), (5, 4303216), (8, 2689510), (10, 2151608), (16, 1344755), (20, 1075804), (40, 537902), (80, 268951), (449, 47920), (599, 35920), (898, 23960), (1198, 17960), (1796, 11980), (2245, 9584), (2396, 8980), (2995, 7184), (3592, 5990), (4490, 4792)]