638992445

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{7759}}^1$

素因数の和:7965

約数の個数: 32

約数和(自身を含む): 949079040

約数和(自身を除く): 310086595

約数列:

[1, 5, 7, 13, 35, 65, 91, 181, 455, 905, 1267, 2353, 6335, 7759, 11765, 16471, 38795, 54313, 82355, 100867, 271565, 504335, 706069, 1404379, 3530345, 7021895, 9830653, 18256927, 49153265, 91284635, 127798489, 638992445]

約数ペア:

[(1, 638992445), (5, 127798489), (7, 91284635), (13, 49153265), (35, 18256927), (65, 9830653), (91, 7021895), (181, 3530345), (455, 1404379), (905, 706069), (1267, 504335), (2353, 271565), (6335, 100867), (7759, 82355), (11765, 54313), (16471, 38795)]