81877355

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 128729088

約数和(自身を除く): 46851733

約数列:

[1, 5, 7, 17, 23, 31, 35, 85, 115, 119, 155, 161, 193, 217, 391, 527, 595, 713, 805, 965, 1085, 1351, 1955, 2635, 2737, 3281, 3565, 3689, 4439, 4991, 5983, 6755, 12121, 13685, 16405, 18445, 22195, 22967, 24955, 29915, 31073, 41881, 60605, 75463, 84847, 101711, 114835, 137609, 155365, 209405, 377315, 424235, 508555, 528241, 688045, 711977, 963263, 2339353, 2641205, 3559885, 4816315, 11696765, 16375471, 81877355]

約数ペア:

[(1, 81877355), (5, 16375471), (7, 11696765), (17, 4816315), (23, 3559885), (31, 2641205), (35, 2339353), (85, 963263), (115, 711977), (119, 688045), (155, 528241), (161, 508555), (193, 424235), (217, 377315), (391, 209405), (527, 155365), (595, 137609), (713, 114835), (805, 101711), (965, 84847), (1085, 75463), (1351, 60605), (1955, 41881), (2635, 31073), (2737, 29915), (3281, 24955), (3565, 22967), (3689, 22195), (4439, 18445), (4991, 16405), (5983, 13685), (6755, 12121)]