21328210

素因数分解:

$2^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{20707}}^1$

素因数の和:20817

約数の個数: 16

約数和(自身を含む): 38765376

約数和(自身を除く): 17437166

約数列:

[1, 2, 5, 10, 103, 206, 515, 1030, 20707, 41414, 103535, 207070, 2132821, 4265642, 10664105, 21328210]

約数ペア:

[(1, 21328210), (2, 10664105), (5, 4265642), (10, 2132821), (103, 207070), (206, 103535), (515, 41414), (1030, 20707)]