21542884

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{353}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 44009280

約数和(自身を除く): 22466396

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 73, 76, 146, 209, 292, 353, 418, 706, 803, 836, 1387, 1412, 1606, 2774, 3212, 3883, 5548, 6707, 7766, 13414, 15257, 15532, 25769, 26828, 30514, 51538, 61028, 73777, 103076, 147554, 283459, 295108, 489611, 566918, 979222, 1133836, 1958444, 5385721, 10771442, 21542884]

約数ペア:

[(1, 21542884), (2, 10771442), (4, 5385721), (11, 1958444), (19, 1133836), (22, 979222), (38, 566918), (44, 489611), (73, 295108), (76, 283459), (146, 147554), (209, 103076), (292, 73777), (353, 61028), (418, 51538), (706, 30514), (803, 26828), (836, 25769), (1387, 15532), (1412, 15257), (1606, 13414), (2774, 7766), (3212, 6707), (3883, 5548)]