21019412

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{309109}}^1$

素因数の和:309130

約数の個数: 12

約数和(自身を含む): 38947860

約数和(自身を除く): 17928448

約数列:

[1, 2, 4, 17, 34, 68, 309109, 618218, 1236436, 5254853, 10509706, 21019412]

約数ペア:

[(1, 21019412), (2, 10509706), (4, 5254853), (17, 1236436), (34, 618218), (68, 309109)]