21687835

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1033}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 31268160

約数和(自身を除く): 9580325

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 1033, 1105, 1235, 1615, 4199, 5165, 13429, 17561, 19627, 20995, 67145, 87805, 98135, 228293, 255151, 333659, 1141465, 1275755, 1668295, 4337567, 21687835]

約数ペア:

[(1, 21687835), (5, 4337567), (13, 1668295), (17, 1275755), (19, 1141465), (65, 333659), (85, 255151), (95, 228293), (221, 98135), (247, 87805), (323, 67145), (1033, 20995), (1105, 19627), (1235, 17561), (1615, 13429), (4199, 5165)]