28688210

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{20639}}^1$

素因数の和:20785

約数の個数: 16

約数和(自身を含む): 52012800

約数和(自身を除く): 23324590

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 20639, 41278, 103195, 206390, 2868821, 5737642, 14344105, 28688210]

約数ペア:

[(1, 28688210), (2, 14344105), (5, 5737642), (10, 2868821), (139, 206390), (278, 103195), (695, 41278), (1390, 20639)]