19857105

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 36947664

約数和(自身を除く): 17090559

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 101, 153, 255, 257, 303, 505, 765, 771, 909, 1285, 1515, 1717, 2313, 3855, 4369, 4545, 5151, 8585, 11565, 13107, 15453, 21845, 25755, 25957, 39321, 65535, 77265, 77871, 129785, 196605, 233613, 389355, 441269, 1168065, 1323807, 2206345, 3971421, 6619035, 19857105]

約数ペア:

[(1, 19857105), (3, 6619035), (5, 3971421), (9, 2206345), (15, 1323807), (17, 1168065), (45, 441269), (51, 389355), (85, 233613), (101, 196605), (153, 129785), (255, 77871), (257, 77265), (303, 65535), (505, 39321), (765, 25957), (771, 25755), (909, 21845), (1285, 15453), (1515, 13107), (1717, 11565), (2313, 8585), (3855, 5151), (4369, 4545)]