28128191

素因数分解:

$7^1\times {\mathrm{13}}^3\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:136

約数の個数: 32

約数和(自身を含む): 36556800

約数和(自身を除く): 8428609

約数列:

[1, 7, 13, 31, 59, 91, 169, 217, 403, 413, 767, 1183, 1829, 2197, 2821, 5239, 5369, 9971, 12803, 15379, 23777, 36673, 68107, 69797, 129623, 166439, 309101, 476749, 907361, 2163707, 4018313, 28128191]

約数ペア:

[(1, 28128191), (7, 4018313), (13, 2163707), (31, 907361), (59, 476749), (91, 309101), (169, 166439), (217, 129623), (403, 69797), (413, 68107), (767, 36673), (1183, 23777), (1829, 15379), (2197, 12803), (2821, 9971), (5239, 5369)]