19781008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{95101}}^1$

素因数の和:95122

約数の個数: 20

約数和(自身を含む): 41274268

約数和(自身を除く): 21493260

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 95101, 190202, 380404, 760808, 1236313, 1521616, 2472626, 4945252, 9890504, 19781008]

約数ペア:

[(1, 19781008), (2, 9890504), (4, 4945252), (8, 2472626), (13, 1521616), (16, 1236313), (26, 760808), (52, 380404), (104, 190202), (208, 95101)]