20983797

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 34369920

約数和(自身を除く): 13386123

約数列:

[1, 3, 9, 17, 23, 51, 67, 69, 89, 153, 201, 207, 267, 391, 603, 801, 1139, 1173, 1513, 1541, 2047, 3417, 3519, 4539, 4623, 5963, 6141, 10251, 13617, 13869, 17889, 18423, 26197, 34799, 53667, 78591, 101371, 104397, 137149, 235773, 304113, 313191, 411447, 912339, 1234341, 2331533, 6994599, 20983797]

約数ペア:

[(1, 20983797), (3, 6994599), (9, 2331533), (17, 1234341), (23, 912339), (51, 411447), (67, 313191), (69, 304113), (89, 235773), (153, 137149), (201, 104397), (207, 101371), (267, 78591), (391, 53667), (603, 34799), (801, 26197), (1139, 18423), (1173, 17889), (1513, 13869), (1541, 13617), (2047, 10251), (3417, 6141), (3519, 5963), (4539, 4623)]