30991996

素因数分解:

$2^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{7963}}^1$

素因数の和:8113

約数の個数: 24

約数和(自身を含む): 62437760

約数和(自身を除く): 31445764

約数列:

[1, 2, 4, 7, 14, 28, 139, 278, 556, 973, 1946, 3892, 7963, 15926, 31852, 55741, 111482, 222964, 1106857, 2213714, 4427428, 7747999, 15495998, 30991996]

約数ペア:

[(1, 30991996), (2, 15495998), (4, 7747999), (7, 4427428), (14, 2213714), (28, 1106857), (139, 222964), (278, 111482), (556, 55741), (973, 31852), (1946, 15926), (3892, 7963)]