21286055

素因数分解:

$5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{2423}}^1$

素因数の和:2686

約数の個数: 16

約数和(自身を含む): 29320704

約数和(自身を除く): 8034649

約数列:

[1, 5, 7, 35, 251, 1255, 1757, 2423, 8785, 12115, 16961, 84805, 608173, 3040865, 4257211, 21286055]

約数ペア:

[(1, 21286055), (5, 4257211), (7, 3040865), (35, 608173), (251, 84805), (1255, 16961), (1757, 12115), (2423, 8785)]