21348305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{659}}^1$

素因数の和:725

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9064495

約数列:

[1, 5, 11, 19, 31, 55, 95, 155, 209, 341, 589, 659, 1045, 1705, 2945, 3295, 6479, 7249, 12521, 20429, 32395, 36245, 62605, 102145, 137731, 224719, 388151, 688655, 1123595, 1940755, 4269661, 21348305]

約数ペア:

[(1, 21348305), (5, 4269661), (11, 1940755), (19, 1123595), (31, 688655), (55, 388151), (95, 224719), (155, 137731), (209, 102145), (341, 62605), (589, 36245), (659, 32395), (1045, 20429), (1705, 12521), (2945, 7249), (3295, 6479)]