19904872

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4451}}^1$

素因数の和:4513

約数の個数: 32

約数和(自身を含む): 41136480

約数和(自身を除く): 21231608

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4451, 4472, 8902, 17804, 35608, 57863, 115726, 191393, 231452, 382786, 462904, 765572, 1531144, 2488109, 4976218, 9952436, 19904872]

約数ペア:

[(1, 19904872), (2, 9952436), (4, 4976218), (8, 2488109), (13, 1531144), (26, 765572), (43, 462904), (52, 382786), (86, 231452), (104, 191393), (172, 115726), (344, 57863), (559, 35608), (1118, 17804), (2236, 8902), (4451, 4472)]