21239936

素因数分解:

$2^7\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:301

約数の個数: 64

約数和(自身を含む): 46046880

約数和(自身を除く): 24806944

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 43, 64, 68, 86, 128, 136, 172, 227, 272, 344, 454, 544, 688, 731, 908, 1088, 1376, 1462, 1816, 2176, 2752, 2924, 3632, 3859, 5504, 5848, 7264, 7718, 9761, 11696, 14528, 15436, 19522, 23392, 29056, 30872, 39044, 46784, 61744, 78088, 93568, 123488, 156176, 165937, 246976, 312352, 331874, 493952, 624704, 663748, 1249408, 1327496, 2654992, 5309984, 10619968, 21239936]

約数ペア:

[(1, 21239936), (2, 10619968), (4, 5309984), (8, 2654992), (16, 1327496), (17, 1249408), (32, 663748), (34, 624704), (43, 493952), (64, 331874), (68, 312352), (86, 246976), (128, 165937), (136, 156176), (172, 123488), (227, 93568), (272, 78088), (344, 61744), (454, 46784), (544, 39044), (688, 30872), (731, 29056), (908, 23392), (1088, 19522), (1376, 15436), (1462, 14528), (1816, 11696), (2176, 9761), (2752, 7718), (2924, 7264), (3632, 5848), (3859, 5504)]