20878131

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{6911}}^1$

素因数の和:6986

約数の個数: 16

約数和(自身を含む): 29859840

約数和(自身を除く): 8981709

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 6911, 20733, 131309, 366283, 393927, 1098849, 6959377, 20878131]

約数ペア:

[(1, 20878131), (3, 6959377), (19, 1098849), (53, 393927), (57, 366283), (159, 131309), (1007, 20733), (3021, 6911)]