81447440

素因数分解:

$2^4\times 5^1\times {\mathrm{571}}^1\times {\mathrm{1783}}^1$

素因数の和:2367

約数の個数: 40

約数和(自身を含む): 189803328

約数和(自身を除く): 108355888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 571, 1142, 1783, 2284, 2855, 3566, 4568, 5710, 7132, 8915, 9136, 11420, 14264, 17830, 22840, 28528, 35660, 45680, 71320, 142640, 1018093, 2036186, 4072372, 5090465, 8144744, 10180930, 16289488, 20361860, 40723720, 81447440]

約数ペア:

[(1, 81447440), (2, 40723720), (4, 20361860), (5, 16289488), (8, 10180930), (10, 8144744), (16, 5090465), (20, 4072372), (40, 2036186), (80, 1018093), (571, 142640), (1142, 71320), (1783, 45680), (2284, 35660), (2855, 28528), (3566, 22840), (4568, 17830), (5710, 14264), (7132, 11420), (8915, 9136)]