21648880

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{337}}^1$

素因数の和:434

約数の個数: 80

約数和(自身を含む): 55826784

約数和(自身を除く): 34177904

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 73, 80, 88, 110, 146, 176, 220, 292, 337, 365, 440, 584, 674, 730, 803, 880, 1168, 1348, 1460, 1606, 1685, 2696, 2920, 3212, 3370, 3707, 4015, 5392, 5840, 6424, 6740, 7414, 8030, 12848, 13480, 14828, 16060, 18535, 24601, 26960, 29656, 32120, 37070, 49202, 59312, 64240, 74140, 98404, 123005, 148280, 196808, 246010, 270611, 296560, 393616, 492020, 541222, 984040, 1082444, 1353055, 1968080, 2164888, 2706110, 4329776, 5412220, 10824440, 21648880]

約数ペア:

[(1, 21648880), (2, 10824440), (4, 5412220), (5, 4329776), (8, 2706110), (10, 2164888), (11, 1968080), (16, 1353055), (20, 1082444), (22, 984040), (40, 541222), (44, 492020), (55, 393616), (73, 296560), (80, 270611), (88, 246010), (110, 196808), (146, 148280), (176, 123005), (220, 98404), (292, 74140), (337, 64240), (365, 59312), (440, 49202), (584, 37070), (674, 32120), (730, 29656), (803, 26960), (880, 24601), (1168, 18535), (1348, 16060), (1460, 14828), (1606, 13480), (1685, 12848), (2696, 8030), (2920, 7414), (3212, 6740), (3370, 6424), (3707, 5840), (4015, 5392)]