21991816

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1879}}^1$

素因数の和:1922

約数の個数: 64

約数和(自身を含む): 54144000

約数和(自身を除く): 32152184

約数列:

[1, 2, 4, 7, 8, 11, 14, 19, 22, 28, 38, 44, 56, 76, 77, 88, 133, 152, 154, 209, 266, 308, 418, 532, 616, 836, 1064, 1463, 1672, 1879, 2926, 3758, 5852, 7516, 11704, 13153, 15032, 20669, 26306, 35701, 41338, 52612, 71402, 82676, 105224, 142804, 144683, 165352, 249907, 285608, 289366, 392711, 499814, 578732, 785422, 999628, 1157464, 1570844, 1999256, 2748977, 3141688, 5497954, 10995908, 21991816]

約数ペア:

[(1, 21991816), (2, 10995908), (4, 5497954), (7, 3141688), (8, 2748977), (11, 1999256), (14, 1570844), (19, 1157464), (22, 999628), (28, 785422), (38, 578732), (44, 499814), (56, 392711), (76, 289366), (77, 285608), (88, 249907), (133, 165352), (152, 144683), (154, 142804), (209, 105224), (266, 82676), (308, 71402), (418, 52612), (532, 41338), (616, 35701), (836, 26306), (1064, 20669), (1463, 15032), (1672, 13153), (1879, 11704), (2926, 7516), (3758, 5852)]