20810979

素因数分解:

$3^3\times 7^1\times {\mathrm{149}}^1\times {\mathrm{739}}^1$

素因数の和:904

約数の個数: 32

約数和(自身を含む): 35520000

約数和(自身を除く): 14709021

約数列:

[1, 3, 7, 9, 21, 27, 63, 149, 189, 447, 739, 1043, 1341, 2217, 3129, 4023, 5173, 6651, 9387, 15519, 19953, 28161, 46557, 110111, 139671, 330333, 770777, 990999, 2312331, 2972997, 6936993, 20810979]

約数ペア:

[(1, 20810979), (3, 6936993), (7, 2972997), (9, 2312331), (21, 990999), (27, 770777), (63, 330333), (149, 139671), (189, 110111), (447, 46557), (739, 28161), (1043, 19953), (1341, 15519), (2217, 9387), (3129, 6651), (4023, 5173)]