257141521

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{701}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 330220800

約数和(自身を除く): 73079279

約数列:

[1, 7, 13, 29, 91, 139, 203, 377, 701, 973, 1807, 2639, 4031, 4907, 9113, 12649, 20329, 28217, 52403, 63791, 97439, 142303, 264277, 366821, 682073, 1266707, 1849939, 2825731, 8866949, 19780117, 36734503, 257141521]

約数ペア:

[(1, 257141521), (7, 36734503), (13, 19780117), (29, 8866949), (91, 2825731), (139, 1849939), (203, 1266707), (377, 682073), (701, 366821), (973, 264277), (1807, 142303), (2639, 97439), (4031, 63791), (4907, 52403), (9113, 28217), (12649, 20329)]