21499407

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{1693}}^1$

素因数の和:1799

約数の個数: 24

約数和(自身を含む): 33297264

約数和(自身を除く): 11797857

約数列:

[1, 3, 9, 17, 51, 83, 153, 249, 747, 1411, 1693, 4233, 5079, 12699, 15237, 28781, 86343, 140519, 259029, 421557, 1264671, 2388823, 7166469, 21499407]

約数ペア:

[(1, 21499407), (3, 7166469), (9, 2388823), (17, 1264671), (51, 421557), (83, 259029), (153, 140519), (249, 86343), (747, 28781), (1411, 15237), (1693, 12699), (4233, 5079)]