20405945

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{25349}}^1$

素因数の和:25384

約数の個数: 16

約数和(自身を含む): 29203200

約数和(自身を除く): 8797255

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 25349, 126745, 177443, 583027, 887215, 2915135, 4081189, 20405945]

約数ペア:

[(1, 20405945), (5, 4081189), (7, 2915135), (23, 887215), (35, 583027), (115, 177443), (161, 126745), (805, 25349)]