21181352

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{331}}^1\times {\mathrm{421}}^1$

素因数の和:777

約数の個数: 32

約数和(自身を含む): 42031200

約数和(自身を除く): 20849848

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 331, 421, 662, 842, 1324, 1684, 2648, 3368, 6289, 7999, 12578, 15998, 25156, 31996, 50312, 63992, 139351, 278702, 557404, 1114808, 2647669, 5295338, 10590676, 21181352]

約数ペア:

[(1, 21181352), (2, 10590676), (4, 5295338), (8, 2647669), (19, 1114808), (38, 557404), (76, 278702), (152, 139351), (331, 63992), (421, 50312), (662, 31996), (842, 25156), (1324, 15998), (1684, 12578), (2648, 7999), (3368, 6289)]