21408219

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2221}}^1$

素因数の和:2257

約数の個数: 40

約数和(自身を含む): 38716128

約数和(自身を除く): 17307909

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2221, 3213, 6663, 9639, 15547, 19989, 37757, 46641, 59967, 113271, 139923, 179901, 264299, 339813, 419769, 792897, 1019439, 1259307, 2378691, 3058317, 7136073, 21408219]

約数ペア:

[(1, 21408219), (3, 7136073), (7, 3058317), (9, 2378691), (17, 1259307), (21, 1019439), (27, 792897), (51, 419769), (63, 339813), (81, 264299), (119, 179901), (153, 139923), (189, 113271), (357, 59967), (459, 46641), (567, 37757), (1071, 19989), (1377, 15547), (2221, 9639), (3213, 6663)]