20509686

素因数分解:

$2^1\times 3^9\times {\mathrm{521}}^1$

素因数の和:550

約数の個数: 40

約数和(自身を含む): 46234584

約数和(自身を除く): 25724898

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 243, 486, 521, 729, 1042, 1458, 1563, 2187, 3126, 4374, 4689, 6561, 9378, 13122, 14067, 19683, 28134, 39366, 42201, 84402, 126603, 253206, 379809, 759618, 1139427, 2278854, 3418281, 6836562, 10254843, 20509686]

約数ペア:

[(1, 20509686), (2, 10254843), (3, 6836562), (6, 3418281), (9, 2278854), (18, 1139427), (27, 759618), (54, 379809), (81, 253206), (162, 126603), (243, 84402), (486, 42201), (521, 39366), (729, 28134), (1042, 19683), (1458, 14067), (1563, 13122), (2187, 9378), (3126, 6561), (4374, 4689)]