20991690

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{77747}}^1$

素因数の和:77763

約数の個数: 32

約数和(自身を含む): 55978560

約数和(自身を除く): 34986870

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270, 77747, 155494, 233241, 388735, 466482, 699723, 777470, 1166205, 1399446, 2099169, 2332410, 3498615, 4198338, 6997230, 10495845, 20991690]

約数ペア:

[(1, 20991690), (2, 10495845), (3, 6997230), (5, 4198338), (6, 3498615), (9, 2332410), (10, 2099169), (15, 1399446), (18, 1166205), (27, 777470), (30, 699723), (45, 466482), (54, 388735), (90, 233241), (135, 155494), (270, 77747)]