21007616

素因数分解:

$2^8\times 7^1\times {\mathrm{19}}^1\times {\mathrm{617}}^1$

素因数の和:659

約数の個数: 72

約数和(自身を含む): 50527680

約数和(自身を除く): 29520064

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, 448, 532, 608, 617, 896, 1064, 1216, 1234, 1792, 2128, 2432, 2468, 4256, 4319, 4864, 4936, 8512, 8638, 9872, 11723, 17024, 17276, 19744, 23446, 34048, 34552, 39488, 46892, 69104, 78976, 82061, 93784, 138208, 157952, 164122, 187568, 276416, 328244, 375136, 552832, 656488, 750272, 1105664, 1312976, 1500544, 2625952, 3001088, 5251904, 10503808, 21007616]

約数ペア:

[(1, 21007616), (2, 10503808), (4, 5251904), (7, 3001088), (8, 2625952), (14, 1500544), (16, 1312976), (19, 1105664), (28, 750272), (32, 656488), (38, 552832), (56, 375136), (64, 328244), (76, 276416), (112, 187568), (128, 164122), (133, 157952), (152, 138208), (224, 93784), (256, 82061), (266, 78976), (304, 69104), (448, 46892), (532, 39488), (608, 34552), (617, 34048), (896, 23446), (1064, 19744), (1216, 17276), (1234, 17024), (1792, 11723), (2128, 9872), (2432, 8638), (2468, 8512), (4256, 4936), (4319, 4864)]