20418405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1399}}^1$

素因数の和:1553

約数の個数: 32

約数和(自身を含む): 37632000

約数和(自身を除く): 17213595

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 139, 417, 695, 973, 1399, 2085, 2919, 4197, 4865, 6995, 9793, 14595, 20985, 29379, 48965, 146895, 194461, 583383, 972305, 1361227, 2916915, 4083681, 6806135, 20418405]

約数ペア:

[(1, 20418405), (3, 6806135), (5, 4083681), (7, 2916915), (15, 1361227), (21, 972305), (35, 583383), (105, 194461), (139, 146895), (417, 48965), (695, 29379), (973, 20985), (1399, 14595), (2085, 9793), (2919, 6995), (4197, 4865)]