218022021

素因数分解:

$3^2\times 7^2\times {\mathrm{494381}}^1$

素因数の和:494401

約数の個数: 18

約数和(自身を含む): 366337062

約数和(自身を除く): 148315041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 494381, 1483143, 3460667, 4449429, 10382001, 24224669, 31146003, 72674007, 218022021]

約数ペア:

[(1, 218022021), (3, 72674007), (7, 31146003), (9, 24224669), (21, 10382001), (49, 4449429), (63, 3460667), (147, 1483143), (441, 494381)]