21117712

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:368

約数の個数: 80

約数和(自身を含む): 52032384

約数和(自身を除く): 30914672

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 61, 77, 88, 112, 122, 154, 176, 244, 281, 308, 427, 488, 562, 616, 671, 854, 976, 1124, 1232, 1342, 1708, 1967, 2248, 2684, 3091, 3416, 3934, 4496, 4697, 5368, 6182, 6832, 7868, 9394, 10736, 12364, 15736, 17141, 18788, 21637, 24728, 31472, 34282, 37576, 43274, 49456, 68564, 75152, 86548, 119987, 137128, 173096, 188551, 239974, 274256, 346192, 377102, 479948, 754204, 959896, 1319857, 1508408, 1919792, 2639714, 3016816, 5279428, 10558856, 21117712]

約数ペア:

[(1, 21117712), (2, 10558856), (4, 5279428), (7, 3016816), (8, 2639714), (11, 1919792), (14, 1508408), (16, 1319857), (22, 959896), (28, 754204), (44, 479948), (56, 377102), (61, 346192), (77, 274256), (88, 239974), (112, 188551), (122, 173096), (154, 137128), (176, 119987), (244, 86548), (281, 75152), (308, 68564), (427, 49456), (488, 43274), (562, 37576), (616, 34282), (671, 31472), (854, 24728), (976, 21637), (1124, 18788), (1232, 17141), (1342, 15736), (1708, 12364), (1967, 10736), (2248, 9394), (2684, 7868), (3091, 6832), (3416, 6182), (3934, 5368), (4496, 4697)]