12840020

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1601}}^1$

素因数の和:2011

約数の個数: 24

約数和(自身を含む): 27048168

約数和(自身を除く): 14208148

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1601, 1604, 2005, 3202, 4010, 6404, 8005, 8020, 16010, 32020, 642001, 1284002, 2568004, 3210005, 6420010, 12840020]

約数ペア:

[(1, 12840020), (2, 6420010), (4, 3210005), (5, 2568004), (10, 1284002), (20, 642001), (401, 32020), (802, 16010), (1601, 8020), (1604, 8005), (2005, 6404), (3202, 4010)]