81191240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{809}}^1$

素因数の和:1026

約数の個数: 64

約数和(自身を含む): 197996400

約数和(自身を除く): 116805160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 193, 260, 386, 520, 772, 809, 965, 1544, 1618, 1930, 2509, 3236, 3860, 4045, 5018, 6472, 7720, 8090, 10036, 10517, 12545, 16180, 20072, 21034, 25090, 32360, 42068, 50180, 52585, 84136, 100360, 105170, 156137, 210340, 312274, 420680, 624548, 780685, 1249096, 1561370, 2029781, 3122740, 4059562, 6245480, 8119124, 10148905, 16238248, 20297810, 40595620, 81191240]

約数ペア:

[(1, 81191240), (2, 40595620), (4, 20297810), (5, 16238248), (8, 10148905), (10, 8119124), (13, 6245480), (20, 4059562), (26, 3122740), (40, 2029781), (52, 1561370), (65, 1249096), (104, 780685), (130, 624548), (193, 420680), (260, 312274), (386, 210340), (520, 156137), (772, 105170), (809, 100360), (965, 84136), (1544, 52585), (1618, 50180), (1930, 42068), (2509, 32360), (3236, 25090), (3860, 21034), (4045, 20072), (5018, 16180), (6472, 12545), (7720, 10517), (8090, 10036)]