18639460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{4591}}^1$

素因数の和:4636

約数の個数: 48

約数和(自身を含む): 46287360

約数和(自身を除く): 27647900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 4591, 9182, 18364, 22955, 32137, 45910, 64274, 91820, 128548, 133139, 160685, 266278, 321370, 532556, 642740, 665695, 931973, 1331390, 1863946, 2662780, 3727892, 4659865, 9319730, 18639460]

約数ペア:

[(1, 18639460), (2, 9319730), (4, 4659865), (5, 3727892), (7, 2662780), (10, 1863946), (14, 1331390), (20, 931973), (28, 665695), (29, 642740), (35, 532556), (58, 321370), (70, 266278), (116, 160685), (140, 133139), (145, 128548), (203, 91820), (290, 64274), (406, 45910), (580, 32137), (812, 22955), (1015, 18364), (2030, 9182), (4060, 4591)]