21565304

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{337}}^1\times {\mathrm{421}}^1$

素因数の和:783

約数の個数: 32

約数和(自身を含む): 42790800

約数和(自身を除く): 21225496

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 337, 421, 674, 842, 1348, 1684, 2696, 3368, 6403, 7999, 12806, 15998, 25612, 31996, 51224, 63992, 141877, 283754, 567508, 1135016, 2695663, 5391326, 10782652, 21565304]

約数ペア:

[(1, 21565304), (2, 10782652), (4, 5391326), (8, 2695663), (19, 1135016), (38, 567508), (76, 283754), (152, 141877), (337, 63992), (421, 51224), (674, 31996), (842, 25612), (1348, 15998), (1684, 12806), (2696, 7999), (3368, 6403)]