20780982

素因数分解:

$2^1\times 3^3\times {\mathrm{53}}^2\times {\mathrm{137}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 47411280

約数和(自身を除く): 26630298

約数列:

[1, 2, 3, 6, 9, 18, 27, 53, 54, 106, 137, 159, 274, 318, 411, 477, 822, 954, 1233, 1431, 2466, 2809, 2862, 3699, 5618, 7261, 7398, 8427, 14522, 16854, 21783, 25281, 43566, 50562, 65349, 75843, 130698, 151686, 196047, 384833, 392094, 769666, 1154499, 2308998, 3463497, 6926994, 10390491, 20780982]

約数ペア:

[(1, 20780982), (2, 10390491), (3, 6926994), (6, 3463497), (9, 2308998), (18, 1154499), (27, 769666), (53, 392094), (54, 384833), (106, 196047), (137, 151686), (159, 130698), (274, 75843), (318, 65349), (411, 50562), (477, 43566), (822, 25281), (954, 21783), (1233, 16854), (1431, 14522), (2466, 8427), (2809, 7398), (2862, 7261), (3699, 5618)]