20120216

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2543}}^1$

素因数の和:2615

約数の個数: 32

約数和(自身を含む): 40296960

約数和(自身を除く): 20176744

約数列:

[1, 2, 4, 8, 23, 43, 46, 86, 92, 172, 184, 344, 989, 1978, 2543, 3956, 5086, 7912, 10172, 20344, 58489, 109349, 116978, 218698, 233956, 437396, 467912, 874792, 2515027, 5030054, 10060108, 20120216]

約数ペア:

[(1, 20120216), (2, 10060108), (4, 5030054), (8, 2515027), (23, 874792), (43, 467912), (46, 437396), (86, 233956), (92, 218698), (172, 116978), (184, 109349), (344, 58489), (989, 20344), (1978, 10172), (2543, 7912), (3956, 5086)]