21177856

素因数分解:

$2^9\times 7^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1$

素因数の和:355

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 29890304

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 64, 76, 112, 128, 133, 152, 224, 256, 266, 304, 311, 448, 512, 532, 608, 622, 896, 1064, 1216, 1244, 1792, 2128, 2177, 2432, 2488, 3584, 4256, 4354, 4864, 4976, 5909, 8512, 8708, 9728, 9952, 11818, 17024, 17416, 19904, 23636, 34048, 34832, 39808, 41363, 47272, 68096, 69664, 79616, 82726, 94544, 139328, 159232, 165452, 189088, 278656, 330904, 378176, 557312, 661808, 756352, 1114624, 1323616, 1512704, 2647232, 3025408, 5294464, 10588928, 21177856]

約数ペア:

[(1, 21177856), (2, 10588928), (4, 5294464), (7, 3025408), (8, 2647232), (14, 1512704), (16, 1323616), (19, 1114624), (28, 756352), (32, 661808), (38, 557312), (56, 378176), (64, 330904), (76, 278656), (112, 189088), (128, 165452), (133, 159232), (152, 139328), (224, 94544), (256, 82726), (266, 79616), (304, 69664), (311, 68096), (448, 47272), (512, 41363), (532, 39808), (608, 34832), (622, 34048), (896, 23636), (1064, 19904), (1216, 17416), (1244, 17024), (1792, 11818), (2128, 9952), (2177, 9728), (2432, 8708), (2488, 8512), (3584, 5909), (4256, 4976), (4354, 4864)]