642100040

素因数分解:

$2^3\times 5^1\times {\mathrm{16052501}}^1$

素因数の和:16052512

約数の個数: 16

約数和(自身を含む): 1444725180

約数和(自身を除く): 802625140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 16052501, 32105002, 64210004, 80262505, 128420008, 160525010, 321050020, 642100040]

約数ペア:

[(1, 642100040), (2, 321050020), (4, 160525010), (5, 128420008), (8, 80262505), (10, 64210004), (20, 32105002), (40, 16052501)]