21021273

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{25667}}^1$

素因数の和:25693

約数の個数: 24

約数和(自身を含む): 37372608

約数和(自身を除く): 16351335

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 25667, 77001, 179669, 231003, 333671, 539007, 1001013, 1617021, 2335697, 3003039, 7007091, 21021273]

約数ペア:

[(1, 21021273), (3, 7007091), (7, 3003039), (9, 2335697), (13, 1617021), (21, 1001013), (39, 539007), (63, 333671), (91, 231003), (117, 179669), (273, 77001), (819, 25667)]