28107885

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 52496640

約数和(自身を除く): 24388755

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 61, 65, 85, 139, 183, 195, 221, 255, 305, 417, 663, 695, 793, 915, 1037, 1105, 1807, 2085, 2363, 2379, 3111, 3315, 3965, 5185, 5421, 7089, 8479, 9035, 11815, 11895, 13481, 15555, 25437, 27105, 30719, 35445, 40443, 42395, 67405, 92157, 110227, 127185, 144143, 153595, 202215, 330681, 432429, 460785, 551135, 720715, 1653405, 1873859, 2162145, 5621577, 9369295, 28107885]

約数ペア:

[(1, 28107885), (3, 9369295), (5, 5621577), (13, 2162145), (15, 1873859), (17, 1653405), (39, 720715), (51, 551135), (61, 460785), (65, 432429), (85, 330681), (139, 202215), (183, 153595), (195, 144143), (221, 127185), (255, 110227), (305, 92157), (417, 67405), (663, 42395), (695, 40443), (793, 35445), (915, 30719), (1037, 27105), (1105, 25437), (1807, 15555), (2085, 13481), (2363, 11895), (2379, 11815), (3111, 9035), (3315, 8479), (3965, 7089), (5185, 5421)]