21137517

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{4423}}^1$

素因数の和:4494

約数の個数: 20

約数和(自身を含む): 32118240

約数和(自身を除く): 10980723

約数列:

[1, 3, 9, 27, 59, 81, 177, 531, 1593, 4423, 4779, 13269, 39807, 119421, 260957, 358263, 782871, 2348613, 7045839, 21137517]

約数ペア:

[(1, 21137517), (3, 7045839), (9, 2348613), (27, 782871), (59, 358263), (81, 260957), (177, 119421), (531, 39807), (1593, 13269), (4423, 4779)]