21506808

素因数分解:

$2^3\times 3^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 56171520

約数和(自身を除く): 34664712

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 31, 62, 93, 124, 137, 186, 211, 248, 274, 372, 411, 422, 548, 633, 744, 822, 844, 1096, 1266, 1644, 1688, 2532, 3288, 4247, 5064, 6541, 8494, 12741, 13082, 16988, 19623, 25482, 26164, 28907, 33976, 39246, 50964, 52328, 57814, 78492, 86721, 101928, 115628, 156984, 173442, 231256, 346884, 693768, 896117, 1792234, 2688351, 3584468, 5376702, 7168936, 10753404, 21506808]

約数ペア:

[(1, 21506808), (2, 10753404), (3, 7168936), (4, 5376702), (6, 3584468), (8, 2688351), (12, 1792234), (24, 896117), (31, 693768), (62, 346884), (93, 231256), (124, 173442), (137, 156984), (186, 115628), (211, 101928), (248, 86721), (274, 78492), (372, 57814), (411, 52328), (422, 50964), (548, 39246), (633, 33976), (744, 28907), (822, 26164), (844, 25482), (1096, 19623), (1266, 16988), (1644, 13082), (1688, 12741), (2532, 8494), (3288, 6541), (4247, 5064)]