21981010

素因数分解:

$2^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{20543}}^1$

素因数の和:20657

約数の個数: 16

約数和(自身を含む): 39937536

約数和(自身を除く): 17956526

約数列:

[1, 2, 5, 10, 107, 214, 535, 1070, 20543, 41086, 102715, 205430, 2198101, 4396202, 10990505, 21981010]

約数ペア:

[(1, 21981010), (2, 10990505), (5, 4396202), (10, 2198101), (107, 205430), (214, 102715), (535, 41086), (1070, 20543)]