21321808

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1823}}^1$

素因数の和:1891

約数の個数: 40

約数和(自身を含む): 44782848

約数和(自身を除く): 23461040

約数列:

[1, 2, 4, 8, 16, 17, 34, 43, 68, 86, 136, 172, 272, 344, 688, 731, 1462, 1823, 2924, 3646, 5848, 7292, 11696, 14584, 29168, 30991, 61982, 78389, 123964, 156778, 247928, 313556, 495856, 627112, 1254224, 1332613, 2665226, 5330452, 10660904, 21321808]

約数ペア:

[(1, 21321808), (2, 10660904), (4, 5330452), (8, 2665226), (16, 1332613), (17, 1254224), (34, 627112), (43, 495856), (68, 313556), (86, 247928), (136, 156778), (172, 123964), (272, 78389), (344, 61982), (688, 30991), (731, 29168), (1462, 14584), (1823, 11696), (2924, 7292), (3646, 5848)]