20914887

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{563}}^1$

素因数の和:663

約数の個数: 32

約数和(自身を含む): 33569280

約数和(自身を除く): 12654393

約数列:

[1, 3, 7, 21, 29, 61, 87, 183, 203, 427, 563, 609, 1281, 1689, 1769, 3941, 5307, 11823, 12383, 16327, 34343, 37149, 48981, 103029, 114289, 240401, 342867, 721203, 995947, 2987841, 6971629, 20914887]

約数ペア:

[(1, 20914887), (3, 6971629), (7, 2987841), (21, 995947), (29, 721203), (61, 342867), (87, 240401), (183, 114289), (203, 103029), (427, 48981), (563, 37149), (609, 34343), (1281, 16327), (1689, 12383), (1769, 11823), (3941, 5307)]