21011796

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:198

約数の個数: 144

約数和(自身を含む): 64209600

約数和(自身を除く): 43197804

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 17, 18, 19, 26, 34, 36, 38, 39, 51, 52, 57, 68, 76, 78, 102, 114, 117, 139, 153, 156, 171, 204, 221, 228, 234, 247, 278, 306, 323, 342, 417, 442, 468, 494, 556, 612, 646, 663, 684, 741, 834, 884, 969, 988, 1251, 1292, 1326, 1482, 1668, 1807, 1938, 1989, 2223, 2363, 2502, 2641, 2652, 2907, 2964, 3614, 3876, 3978, 4199, 4446, 4726, 5004, 5282, 5421, 5814, 7089, 7228, 7923, 7956, 8398, 8892, 9452, 10564, 10842, 11628, 12597, 14178, 15846, 16263, 16796, 21267, 21684, 23769, 25194, 28356, 30719, 31692, 32526, 34333, 37791, 42534, 44897, 47538, 50388, 61438, 65052, 68666, 75582, 85068, 89794, 92157, 95076, 102999, 122876, 134691, 137332, 151164, 179588, 184314, 205998, 269382, 276471, 308997, 368628, 404073, 411996, 538764, 552942, 583661, 617994, 808146, 1105884, 1167322, 1235988, 1616292, 1750983, 2334644, 3501966, 5252949, 7003932, 10505898, 21011796]

約数ペア:

[(1, 21011796), (2, 10505898), (3, 7003932), (4, 5252949), (6, 3501966), (9, 2334644), (12, 1750983), (13, 1616292), (17, 1235988), (18, 1167322), (19, 1105884), (26, 808146), (34, 617994), (36, 583661), (38, 552942), (39, 538764), (51, 411996), (52, 404073), (57, 368628), (68, 308997), (76, 276471), (78, 269382), (102, 205998), (114, 184314), (117, 179588), (139, 151164), (153, 137332), (156, 134691), (171, 122876), (204, 102999), (221, 95076), (228, 92157), (234, 89794), (247, 85068), (278, 75582), (306, 68666), (323, 65052), (342, 61438), (417, 50388), (442, 47538), (468, 44897), (494, 42534), (556, 37791), (612, 34333), (646, 32526), (663, 31692), (684, 30719), (741, 28356), (834, 25194), (884, 23769), (969, 21684), (988, 21267), (1251, 16796), (1292, 16263), (1326, 15846), (1482, 14178), (1668, 12597), (1807, 11628), (1938, 10842), (1989, 10564), (2223, 9452), (2363, 8892), (2502, 8398), (2641, 7956), (2652, 7923), (2907, 7228), (2964, 7089), (3614, 5814), (3876, 5421), (3978, 5282), (4199, 5004), (4446, 4726)]