21398456

素因数分解:

$2^3\times {\mathrm{103}}^1\times {\mathrm{25969}}^1$

素因数の和:26078

約数の個数: 16

約数和(自身を含む): 40513200

約数和(自身を除く): 19114744

約数列:

[1, 2, 4, 8, 103, 206, 412, 824, 25969, 51938, 103876, 207752, 2674807, 5349614, 10699228, 21398456]

約数ペア:

[(1, 21398456), (2, 10699228), (4, 5349614), (8, 2674807), (103, 207752), (206, 103876), (412, 51938), (824, 25969)]