21216352

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:311

約数の個数: 48

約数和(自身を含む): 43479072

約数和(自身を除く): 22262720

約数列:

[1, 2, 4, 8, 16, 32, 41, 82, 103, 157, 164, 206, 314, 328, 412, 628, 656, 824, 1256, 1312, 1648, 2512, 3296, 4223, 5024, 6437, 8446, 12874, 16171, 16892, 25748, 32342, 33784, 51496, 64684, 67568, 102992, 129368, 135136, 205984, 258736, 517472, 663011, 1326022, 2652044, 5304088, 10608176, 21216352]

約数ペア:

[(1, 21216352), (2, 10608176), (4, 5304088), (8, 2652044), (16, 1326022), (32, 663011), (41, 517472), (82, 258736), (103, 205984), (157, 135136), (164, 129368), (206, 102992), (314, 67568), (328, 64684), (412, 51496), (628, 33784), (656, 32342), (824, 25748), (1256, 16892), (1312, 16171), (1648, 12874), (2512, 8446), (3296, 6437), (4223, 5024)]