21404656

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 52093888

約数和(自身を除く): 30689232

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 61, 91, 104, 112, 122, 182, 208, 241, 244, 364, 427, 482, 488, 728, 793, 854, 964, 976, 1456, 1586, 1687, 1708, 1928, 3133, 3172, 3374, 3416, 3856, 5551, 6266, 6344, 6748, 6832, 11102, 12532, 12688, 13496, 14701, 21931, 22204, 25064, 26992, 29402, 43862, 44408, 50128, 58804, 87724, 88816, 102907, 117608, 175448, 191113, 205814, 235216, 350896, 382226, 411628, 764452, 823256, 1337791, 1528904, 1646512, 2675582, 3057808, 5351164, 10702328, 21404656]

約数ペア:

[(1, 21404656), (2, 10702328), (4, 5351164), (7, 3057808), (8, 2675582), (13, 1646512), (14, 1528904), (16, 1337791), (26, 823256), (28, 764452), (52, 411628), (56, 382226), (61, 350896), (91, 235216), (104, 205814), (112, 191113), (122, 175448), (182, 117608), (208, 102907), (241, 88816), (244, 87724), (364, 58804), (427, 50128), (482, 44408), (488, 43862), (728, 29402), (793, 26992), (854, 25064), (964, 22204), (976, 21931), (1456, 14701), (1586, 13496), (1687, 12688), (1708, 12532), (1928, 11102), (3133, 6832), (3172, 6748), (3374, 6344), (3416, 6266), (3856, 5551)]