156978364

素因数分解:

$2^2\times {\mathrm{199}}^2\times {\mathrm{991}}^1$

素因数の和:1393

約数の個数: 18

約数和(自身を含む): 276378144

約数和(自身を除く): 119399780

約数列:

[1, 2, 4, 199, 398, 796, 991, 1982, 3964, 39601, 79202, 158404, 197209, 394418, 788836, 39244591, 78489182, 156978364]

約数ペア:

[(1, 156978364), (2, 78489182), (4, 39244591), (199, 788836), (398, 394418), (796, 197209), (991, 158404), (1982, 79202), (3964, 39601)]