21967990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{457}}^1$

素因数の和:517

約数の個数: 64

約数和(自身を含む): 47485440

約数和(自身を除く): 25517450

約数列:

[1, 2, 5, 10, 11, 19, 22, 23, 38, 46, 55, 95, 110, 115, 190, 209, 230, 253, 418, 437, 457, 506, 874, 914, 1045, 1265, 2090, 2185, 2285, 2530, 4370, 4570, 4807, 5027, 8683, 9614, 10054, 10511, 17366, 21022, 24035, 25135, 43415, 48070, 50270, 52555, 86830, 95513, 105110, 115621, 191026, 199709, 231242, 399418, 477565, 578105, 955130, 998545, 1156210, 1997090, 2196799, 4393598, 10983995, 21967990]

約数ペア:

[(1, 21967990), (2, 10983995), (5, 4393598), (10, 2196799), (11, 1997090), (19, 1156210), (22, 998545), (23, 955130), (38, 578105), (46, 477565), (55, 399418), (95, 231242), (110, 199709), (115, 191026), (190, 115621), (209, 105110), (230, 95513), (253, 86830), (418, 52555), (437, 50270), (457, 48070), (506, 43415), (874, 25135), (914, 24035), (1045, 21022), (1265, 17366), (2090, 10511), (2185, 10054), (2285, 9614), (2530, 8683), (4370, 5027), (4570, 4807)]