21036735

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 39121056

約数和(自身を除く): 18084321

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 107, 153, 255, 257, 321, 535, 765, 771, 963, 1285, 1605, 1819, 2313, 3855, 4369, 4815, 5457, 9095, 11565, 13107, 16371, 21845, 27285, 27499, 39321, 65535, 81855, 82497, 137495, 196605, 247491, 412485, 467483, 1237455, 1402449, 2337415, 4207347, 7012245, 21036735]

約数ペア:

[(1, 21036735), (3, 7012245), (5, 4207347), (9, 2337415), (15, 1402449), (17, 1237455), (45, 467483), (51, 412485), (85, 247491), (107, 196605), (153, 137495), (255, 82497), (257, 81855), (321, 65535), (535, 39321), (765, 27499), (771, 27285), (963, 21845), (1285, 16371), (1605, 13107), (1819, 11565), (2313, 9095), (3855, 5457), (4369, 4815)]