21978448

素因数分解:

$2^4\times {\mathrm{829}}^1\times {\mathrm{1657}}^1$

素因数の和:2494

約数の個数: 20

約数和(自身を含む): 42660340

約数和(自身を除く): 20681892

約数列:

[1, 2, 4, 8, 16, 829, 1657, 1658, 3314, 3316, 6628, 6632, 13256, 13264, 26512, 1373653, 2747306, 5494612, 10989224, 21978448]

約数ペア:

[(1, 21978448), (2, 10989224), (4, 5494612), (8, 2747306), (16, 1373653), (829, 26512), (1657, 13264), (1658, 13256), (3314, 6632), (3316, 6628)]