21291389

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{1663}}^1$

素因数の和:1760

約数の個数: 16

約数和(自身を含む): 25559040

約数和(自身を除く): 4267651

約数列:

[1, 7, 31, 59, 217, 413, 1663, 1829, 11641, 12803, 51553, 98117, 360871, 686819, 3041627, 21291389]

約数ペア:

[(1, 21291389), (7, 3041627), (31, 686819), (59, 360871), (217, 98117), (413, 51553), (1663, 12803), (1829, 11641)]