78425980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{91193}}^1$

素因数の和:91245

約数の個数: 24

約数和(自身を含む): 168526512

約数和(自身を除く): 90100532

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 91193, 182386, 364772, 455965, 911930, 1823860, 3921299, 7842598, 15685196, 19606495, 39212990, 78425980]

約数ペア:

[(1, 78425980), (2, 39212990), (4, 19606495), (5, 15685196), (10, 7842598), (20, 3921299), (43, 1823860), (86, 911930), (172, 455965), (215, 364772), (430, 182386), (860, 91193)]