21786681

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1049}}^1$

素因数の和:1125

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 13694919

約数列:

[1, 3, 7, 21, 23, 43, 69, 129, 161, 301, 483, 903, 989, 1049, 2967, 3147, 6923, 7343, 20769, 22029, 24127, 45107, 72381, 135321, 168889, 315749, 506667, 947247, 1037461, 3112383, 7262227, 21786681]

約数ペア:

[(1, 21786681), (3, 7262227), (7, 3112383), (21, 1037461), (23, 947247), (43, 506667), (69, 315749), (129, 168889), (161, 135321), (301, 72381), (483, 45107), (903, 24127), (989, 22029), (1049, 20769), (2967, 7343), (3147, 6923)]