20081840

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1451}}^1$

素因数の和:1637

約数の個数: 40

約数和(自身を含む): 46992528

約数和(自身を除く): 26910688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1451, 1730, 2768, 2902, 3460, 5804, 6920, 7255, 11608, 13840, 14510, 23216, 29020, 58040, 116080, 251023, 502046, 1004092, 1255115, 2008184, 2510230, 4016368, 5020460, 10040920, 20081840]

約数ペア:

[(1, 20081840), (2, 10040920), (4, 5020460), (5, 4016368), (8, 2510230), (10, 2008184), (16, 1255115), (20, 1004092), (40, 502046), (80, 251023), (173, 116080), (346, 58040), (692, 29020), (865, 23216), (1384, 14510), (1451, 13840), (1730, 11608), (2768, 7255), (2902, 6920), (3460, 5804)]