20678390

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 38301120

約数和(自身を除く): 17622730

約数列:

[1, 2, 5, 10, 61, 109, 122, 218, 305, 311, 545, 610, 622, 1090, 1555, 3110, 6649, 13298, 18971, 33245, 33899, 37942, 66490, 67798, 94855, 169495, 189710, 338990, 2067839, 4135678, 10339195, 20678390]

約数ペア:

[(1, 20678390), (2, 10339195), (5, 4135678), (10, 2067839), (61, 338990), (109, 189710), (122, 169495), (218, 94855), (305, 67798), (311, 66490), (545, 37942), (610, 33899), (622, 33245), (1090, 18971), (1555, 13298), (3110, 6649)]