20680208

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{1153}}^1$

素因数の和:1239

約数の個数: 40

約数和(自身を含む): 42928800

約数和(自身を除く): 22248592

約数列:

[1, 2, 4, 8, 16, 19, 38, 59, 76, 118, 152, 236, 304, 472, 944, 1121, 1153, 2242, 2306, 4484, 4612, 8968, 9224, 17936, 18448, 21907, 43814, 68027, 87628, 136054, 175256, 272108, 350512, 544216, 1088432, 1292513, 2585026, 5170052, 10340104, 20680208]

約数ペア:

[(1, 20680208), (2, 10340104), (4, 5170052), (8, 2585026), (16, 1292513), (19, 1088432), (38, 544216), (59, 350512), (76, 272108), (118, 175256), (152, 136054), (236, 87628), (304, 68027), (472, 43814), (944, 21907), (1121, 18448), (1153, 17936), (2242, 9224), (2306, 8968), (4484, 4612)]