20581985

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 27620352

約数和(自身を除く): 7038367

約数列:

[1, 5, 17, 31, 73, 85, 107, 155, 365, 527, 535, 1241, 1819, 2263, 2635, 3317, 6205, 7811, 9095, 11315, 16585, 38471, 39055, 56389, 132787, 192355, 242141, 281945, 663935, 1210705, 4116397, 20581985]

約数ペア:

[(1, 20581985), (5, 4116397), (17, 1210705), (31, 663935), (73, 281945), (85, 242141), (107, 192355), (155, 132787), (365, 56389), (527, 39055), (535, 38471), (1241, 16585), (1819, 11315), (2263, 9095), (2635, 7811), (3317, 6205)]