20216915

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{2081}}^1$

素因数の和:2182

約数の個数: 16

約数和(自身を含む): 25483680

約数和(自身を除く): 5266765

約数列:

[1, 5, 29, 67, 145, 335, 1943, 2081, 9715, 10405, 60349, 139427, 301745, 697135, 4043383, 20216915]

約数ペア:

[(1, 20216915), (5, 4043383), (29, 697135), (67, 301745), (145, 139427), (335, 60349), (1943, 10405), (2081, 9715)]