21142355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 28728000

約数和(自身を除く): 7585645

約数列:

[1, 5, 13, 37, 59, 65, 149, 185, 295, 481, 745, 767, 1937, 2183, 2405, 3835, 5513, 8791, 9685, 10915, 27565, 28379, 43955, 71669, 114283, 141895, 325267, 358345, 571415, 1626335, 4228471, 21142355]

約数ペア:

[(1, 21142355), (5, 4228471), (13, 1626335), (37, 571415), (59, 358345), (65, 325267), (149, 141895), (185, 114283), (295, 71669), (481, 43955), (745, 28379), (767, 27565), (1937, 10915), (2183, 9685), (2405, 8791), (3835, 5513)]