21007835

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^2\times {\mathrm{71}}^1$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 27534816

約数和(自身を除く): 6526981

約数列:

[1, 5, 17, 59, 71, 85, 295, 355, 1003, 1207, 3481, 4189, 5015, 6035, 17405, 20945, 59177, 71213, 247151, 295885, 356065, 1235755, 4201567, 21007835]

約数ペア:

[(1, 21007835), (5, 4201567), (17, 1235755), (59, 356065), (71, 295885), (85, 247151), (295, 71213), (355, 59177), (1003, 20945), (1207, 17405), (3481, 6035), (4189, 5015)]