21253844

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{653}}^1$

素因数の和:839

約数の個数: 24

約数和(自身を含む): 38088960

約数和(自身を除く): 16835116

約数列:

[1, 2, 4, 79, 103, 158, 206, 316, 412, 653, 1306, 2612, 8137, 16274, 32548, 51587, 67259, 103174, 134518, 206348, 269036, 5313461, 10626922, 21253844]

約数ペア:

[(1, 21253844), (2, 10626922), (4, 5313461), (79, 269036), (103, 206348), (158, 134518), (206, 103174), (316, 67259), (412, 51587), (653, 32548), (1306, 16274), (2612, 8137)]