21239988

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{181}}^1$

素因数の和:333

約数の個数: 96

約数和(自身を含む): 62619648

約数和(自身を除く): 41379660

約数列:

[1, 2, 3, 4, 6, 7, 11, 12, 14, 21, 22, 28, 33, 42, 44, 66, 77, 84, 127, 132, 154, 181, 231, 254, 308, 362, 381, 462, 508, 543, 724, 762, 889, 924, 1086, 1267, 1397, 1524, 1778, 1991, 2172, 2534, 2667, 2794, 3556, 3801, 3982, 4191, 5068, 5334, 5588, 5973, 7602, 7964, 8382, 9779, 10668, 11946, 13937, 15204, 16764, 19558, 22987, 23892, 27874, 29337, 39116, 41811, 45974, 55748, 58674, 68961, 83622, 91948, 117348, 137922, 160909, 167244, 252857, 275844, 321818, 482727, 505714, 643636, 758571, 965454, 1011428, 1517142, 1769999, 1930908, 3034284, 3539998, 5309997, 7079996, 10619994, 21239988]

約数ペア:

[(1, 21239988), (2, 10619994), (3, 7079996), (4, 5309997), (6, 3539998), (7, 3034284), (11, 1930908), (12, 1769999), (14, 1517142), (21, 1011428), (22, 965454), (28, 758571), (33, 643636), (42, 505714), (44, 482727), (66, 321818), (77, 275844), (84, 252857), (127, 167244), (132, 160909), (154, 137922), (181, 117348), (231, 91948), (254, 83622), (308, 68961), (362, 58674), (381, 55748), (462, 45974), (508, 41811), (543, 39116), (724, 29337), (762, 27874), (889, 23892), (924, 22987), (1086, 19558), (1267, 16764), (1397, 15204), (1524, 13937), (1778, 11946), (1991, 10668), (2172, 9779), (2534, 8382), (2667, 7964), (2794, 7602), (3556, 5973), (3801, 5588), (3982, 5334), (4191, 5068)]