20643728

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:232

約数の個数: 80

約数和(自身を含む): 49104000

約数和(自身を除く): 28460272

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 89, 109, 112, 133, 152, 178, 218, 266, 304, 356, 436, 532, 623, 712, 763, 872, 1064, 1246, 1424, 1526, 1691, 1744, 2071, 2128, 2492, 3052, 3382, 4142, 4984, 6104, 6764, 8284, 9701, 9968, 11837, 12208, 13528, 14497, 16568, 19402, 23674, 27056, 28994, 33136, 38804, 47348, 57988, 67907, 77608, 94696, 115976, 135814, 155216, 184319, 189392, 231952, 271628, 368638, 543256, 737276, 1086512, 1290233, 1474552, 2580466, 2949104, 5160932, 10321864, 20643728]

約数ペア:

[(1, 20643728), (2, 10321864), (4, 5160932), (7, 2949104), (8, 2580466), (14, 1474552), (16, 1290233), (19, 1086512), (28, 737276), (38, 543256), (56, 368638), (76, 271628), (89, 231952), (109, 189392), (112, 184319), (133, 155216), (152, 135814), (178, 115976), (218, 94696), (266, 77608), (304, 67907), (356, 57988), (436, 47348), (532, 38804), (623, 33136), (712, 28994), (763, 27056), (872, 23674), (1064, 19402), (1246, 16568), (1424, 14497), (1526, 13528), (1691, 12208), (1744, 11837), (2071, 9968), (2128, 9701), (2492, 8284), (3052, 6764), (3382, 6104), (4142, 4984)]