20978986

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{487}}^1$

素因数の和:694

約数の個数: 32

約数和(自身を含む): 38368512

約数和(自身を除く): 17389526

約数列:

[1, 2, 7, 14, 17, 34, 119, 181, 238, 362, 487, 974, 1267, 2534, 3077, 3409, 6154, 6818, 8279, 16558, 21539, 43078, 57953, 88147, 115906, 176294, 617029, 1234058, 1498499, 2996998, 10489493, 20978986]

約数ペア:

[(1, 20978986), (2, 10489493), (7, 2996998), (14, 1498499), (17, 1234058), (34, 617029), (119, 176294), (181, 115906), (238, 88147), (362, 57953), (487, 43078), (974, 21539), (1267, 16558), (2534, 8279), (3077, 6818), (3409, 6154)]