28709213

素因数分解:

${\mathrm{13}}^2\times {\mathrm{257}}^1\times {\mathrm{661}}^1$

素因数の和:944

約数の個数: 12

約数和(自身を含む): 31255668

約数和(自身を除く): 2546455

約数列:

[1, 13, 169, 257, 661, 3341, 8593, 43433, 111709, 169877, 2208401, 28709213]

約数ペア:

[(1, 28709213), (13, 2208401), (169, 169877), (257, 111709), (661, 43433), (3341, 8593)]