19818040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{617}}^1$

素因数の和:712

約数の個数: 64

約数和(自身を含む): 49390560

約数和(自身を除く): 29572520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 617, 730, 803, 1234, 1460, 1606, 2468, 2920, 3085, 3212, 4015, 4936, 6170, 6424, 6787, 8030, 12340, 13574, 16060, 24680, 27148, 32120, 33935, 45041, 54296, 67870, 90082, 135740, 180164, 225205, 271480, 360328, 450410, 495451, 900820, 990902, 1801640, 1981804, 2477255, 3963608, 4954510, 9909020, 19818040]

約数ペア:

[(1, 19818040), (2, 9909020), (4, 4954510), (5, 3963608), (8, 2477255), (10, 1981804), (11, 1801640), (20, 990902), (22, 900820), (40, 495451), (44, 450410), (55, 360328), (73, 271480), (88, 225205), (110, 180164), (146, 135740), (220, 90082), (292, 67870), (365, 54296), (440, 45041), (584, 33935), (617, 32120), (730, 27148), (803, 24680), (1234, 16060), (1460, 13574), (1606, 12340), (2468, 8030), (2920, 6787), (3085, 6424), (3212, 6170), (4015, 4936)]