19999898

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{1621}}^1$

素因数の和:1853

約数の個数: 16

約数和(自身を含む): 31142400

約数和(自身を除く): 11142502

約数列:

[1, 2, 31, 62, 199, 398, 1621, 3242, 6169, 12338, 50251, 100502, 322579, 645158, 9999949, 19999898]

約数ペア:

[(1, 19999898), (2, 9999949), (31, 645158), (62, 322579), (199, 100502), (398, 50251), (1621, 12338), (3242, 6169)]