21167839

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:295

約数の個数: 32

約数和(自身を含む): 28394496

約数和(自身を除く): 7226657

約数列:

[1, 7, 11, 17, 77, 103, 119, 157, 187, 721, 1099, 1133, 1309, 1727, 1751, 2669, 7931, 12089, 12257, 16171, 18683, 19261, 29359, 113197, 134827, 177881, 205513, 274907, 1245167, 1924349, 3023977, 21167839]

約数ペア:

[(1, 21167839), (7, 3023977), (11, 1924349), (17, 1245167), (77, 274907), (103, 205513), (119, 177881), (157, 134827), (187, 113197), (721, 29359), (1099, 19261), (1133, 18683), (1309, 16171), (1727, 12257), (1751, 12089), (2669, 7931)]