21329289

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{229}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 31574400

約数和(自身を除く): 10245111

約数列:

[1, 3, 9, 79, 131, 229, 237, 393, 687, 711, 1179, 2061, 10349, 18091, 29999, 31047, 54273, 89997, 93141, 162819, 269991, 2369921, 7109763, 21329289]

約数ペア:

[(1, 21329289), (3, 7109763), (9, 2369921), (79, 269991), (131, 162819), (229, 93141), (237, 89997), (393, 54273), (687, 31047), (711, 29999), (1179, 18091), (2061, 10349)]