78708040

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{22109}}^1$

素因数の和:22209

約数の個数: 32

約数和(自身を含む): 179091000

約数和(自身を除く): 100382960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 22109, 44218, 88436, 110545, 176872, 221090, 442180, 884360, 1967701, 3935402, 7870804, 9838505, 15741608, 19677010, 39354020, 78708040]

約数ペア:

[(1, 78708040), (2, 39354020), (4, 19677010), (5, 15741608), (8, 9838505), (10, 7870804), (20, 3935402), (40, 1967701), (89, 884360), (178, 442180), (356, 221090), (445, 176872), (712, 110545), (890, 88436), (1780, 44218), (3560, 22109)]