18811984

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:827

約数の個数: 40

約数和(自身を含む): 38355680

約数和(自身を除く): 19543696

約数列:

[1, 2, 4, 8, 16, 37, 43, 74, 86, 148, 172, 296, 344, 592, 688, 739, 1478, 1591, 2956, 3182, 5912, 6364, 11824, 12728, 25456, 27343, 31777, 54686, 63554, 109372, 127108, 218744, 254216, 437488, 508432, 1175749, 2351498, 4702996, 9405992, 18811984]

約数ペア:

[(1, 18811984), (2, 9405992), (4, 4702996), (8, 2351498), (16, 1175749), (37, 508432), (43, 437488), (74, 254216), (86, 218744), (148, 127108), (172, 109372), (296, 63554), (344, 54686), (592, 31777), (688, 27343), (739, 25456), (1478, 12728), (1591, 11824), (2956, 6364), (3182, 5912)]