667039280

素因数分解:

$2^4\times 5^1\times {\mathrm{8337991}}^1$

素因数の和:8338004

約数の個数: 20

約数和(自身を含む): 1550866512

約数和(自身を除く): 883827232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8337991, 16675982, 33351964, 41689955, 66703928, 83379910, 133407856, 166759820, 333519640, 667039280]

約数ペア:

[(1, 667039280), (2, 333519640), (4, 166759820), (5, 133407856), (8, 83379910), (10, 66703928), (16, 41689955), (20, 33351964), (40, 16675982), (80, 8337991)]