18947984

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{541}}^1$

素因数の和:759

約数の個数: 40

約数和(自身を含む): 40324800

約数和(自身を除く): 21376816

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 199, 398, 541, 796, 1082, 1592, 2164, 2189, 3184, 4328, 4378, 5951, 8656, 8756, 11902, 17512, 23804, 35024, 47608, 95216, 107659, 215318, 430636, 861272, 1184249, 1722544, 2368498, 4736996, 9473992, 18947984]

約数ペア:

[(1, 18947984), (2, 9473992), (4, 4736996), (8, 2368498), (11, 1722544), (16, 1184249), (22, 861272), (44, 430636), (88, 215318), (176, 107659), (199, 95216), (398, 47608), (541, 35024), (796, 23804), (1082, 17512), (1592, 11902), (2164, 8756), (2189, 8656), (3184, 5951), (4328, 4378)]