21624590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{419}}^1$

素因数の和:836

約数の個数: 32

約数和(自身を含む): 42124320

約数和(自身を除く): 20499730

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 397, 419, 794, 838, 1985, 2095, 3970, 4190, 5161, 5447, 10322, 10894, 25805, 27235, 51610, 54470, 166343, 332686, 831715, 1663430, 2162459, 4324918, 10812295, 21624590]

約数ペア:

[(1, 21624590), (2, 10812295), (5, 4324918), (10, 2162459), (13, 1663430), (26, 831715), (65, 332686), (130, 166343), (397, 54470), (419, 51610), (794, 27235), (838, 25805), (1985, 10894), (2095, 10322), (3970, 5447), (4190, 5161)]