640118605

素因数分解:

$5^1\times 7^4\times {\mathrm{71}}^1\times {\mathrm{751}}^1$

素因数の和:855

約数の個数: 40

約数和(自身を含む): 909944064

約数和(自身を除く): 269825459

約数列:

[1, 5, 7, 35, 49, 71, 245, 343, 355, 497, 751, 1715, 2401, 2485, 3479, 3755, 5257, 12005, 17395, 24353, 26285, 36799, 53321, 121765, 170471, 183995, 257593, 266605, 373247, 852355, 1287965, 1803151, 1866235, 2612729, 9015755, 13063645, 18289103, 91445515, 128023721, 640118605]

約数ペア:

[(1, 640118605), (5, 128023721), (7, 91445515), (35, 18289103), (49, 13063645), (71, 9015755), (245, 2612729), (343, 1866235), (355, 1803151), (497, 1287965), (751, 852355), (1715, 373247), (2401, 266605), (2485, 257593), (3479, 183995), (3755, 170471), (5257, 121765), (12005, 53321), (17395, 36799), (24353, 26285)]