21787760

素因数分解:

$2^4\times 5^1\times {\mathrm{272347}}^1$

素因数の和:272360

約数の個数: 20

約数和(自身を含む): 50656728

約数和(自身を除く): 28868968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272347, 544694, 1089388, 1361735, 2178776, 2723470, 4357552, 5446940, 10893880, 21787760]

約数ペア:

[(1, 21787760), (2, 10893880), (4, 5446940), (5, 4357552), (8, 2723470), (10, 2178776), (16, 1361735), (20, 1089388), (40, 544694), (80, 272347)]