19900478

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{631}}^1\times {\mathrm{1213}}^1$

素因数の和:1859

約数の個数: 16

約数和(自身を含む): 32224416

約数和(自身を除く): 12323938

約数列:

[1, 2, 13, 26, 631, 1213, 1262, 2426, 8203, 15769, 16406, 31538, 765403, 1530806, 9950239, 19900478]

約数ペア:

[(1, 19900478), (2, 9950239), (13, 1530806), (26, 765403), (631, 31538), (1213, 16406), (1262, 15769), (2426, 8203)]