20289381

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{353}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 34867584

約数和(自身を除く): 14578203

約数列:

[1, 3, 7, 17, 21, 23, 49, 51, 69, 119, 147, 161, 353, 357, 391, 483, 833, 1059, 1127, 1173, 2471, 2499, 2737, 3381, 6001, 7413, 8119, 8211, 17297, 18003, 19159, 24357, 42007, 51891, 56833, 57477, 126021, 138023, 170499, 294049, 397831, 414069, 882147, 966161, 1193493, 2898483, 6763127, 20289381]

約数ペア:

[(1, 20289381), (3, 6763127), (7, 2898483), (17, 1193493), (21, 966161), (23, 882147), (49, 414069), (51, 397831), (69, 294049), (119, 170499), (147, 138023), (161, 126021), (353, 57477), (357, 56833), (391, 51891), (483, 42007), (833, 24357), (1059, 19159), (1127, 18003), (1173, 17297), (2471, 8211), (2499, 8119), (2737, 7413), (3381, 6001)]