20990294

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:344

約数の個数: 32

約数和(自身を含む): 35199360

約数和(自身を除く): 14209066

約数列:

[1, 2, 13, 26, 47, 89, 94, 178, 193, 386, 611, 1157, 1222, 2314, 2509, 4183, 5018, 8366, 9071, 17177, 18142, 34354, 54379, 108758, 117923, 223301, 235846, 446602, 807319, 1614638, 10495147, 20990294]

約数ペア:

[(1, 20990294), (2, 10495147), (13, 1614638), (26, 807319), (47, 446602), (89, 235846), (94, 223301), (178, 117923), (193, 108758), (386, 54379), (611, 34354), (1157, 18142), (1222, 17177), (2314, 9071), (2509, 8366), (4183, 5018)]