21749553

素因数分解:

$3^4\times 7^1\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:539

約数の個数: 40

約数和(自身を含む): 37635840

約数和(自身を除く): 15886287

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 89, 189, 267, 431, 567, 623, 801, 1293, 1869, 2403, 3017, 3879, 5607, 7209, 9051, 11637, 16821, 27153, 34911, 38359, 50463, 81459, 115077, 244377, 268513, 345231, 805539, 1035693, 2416617, 3107079, 7249851, 21749553]

約数ペア:

[(1, 21749553), (3, 7249851), (7, 3107079), (9, 2416617), (21, 1035693), (27, 805539), (63, 345231), (81, 268513), (89, 244377), (189, 115077), (267, 81459), (431, 50463), (567, 38359), (623, 34911), (801, 27153), (1293, 16821), (1869, 11637), (2403, 9051), (3017, 7209), (3879, 5607)]