28120810

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{7229}}^1$

素因数の和:7625

約数の個数: 16

約数和(自身を含む): 50754600

約数和(自身を除く): 22633790

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 7229, 14458, 36145, 72290, 2812081, 5624162, 14060405, 28120810]

約数ペア:

[(1, 28120810), (2, 14060405), (5, 5624162), (10, 2812081), (389, 72290), (778, 36145), (1945, 14458), (3890, 7229)]