78478165720

素因数分解:

$2^3\times 5^1\times {\mathrm{1961954143}}^1$

素因数の和:1961954154

約数の個数: 16

約数和(自身を含む): 176575872960

約数和(自身を除く): 98097707240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1961954143, 3923908286, 7847816572, 9809770715, 15695633144, 19619541430, 39239082860, 78478165720]

約数ペア:

[(1, 78478165720), (2, 39239082860), (4, 19619541430), (5, 15695633144), (8, 9809770715), (10, 7847816572), (20, 3923908286), (40, 1961954143)]