21138327

素因数分解:

$3^5\times 7^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1$

素因数の和:99

約数の個数: 72

約数和(自身を含む): 39335296

約数和(自身を除く): 18196969

約数列:

[1, 3, 7, 9, 17, 21, 27, 43, 51, 63, 81, 119, 129, 153, 189, 243, 289, 301, 357, 387, 459, 567, 731, 867, 903, 1071, 1161, 1377, 1701, 2023, 2193, 2601, 2709, 3213, 3483, 4131, 5117, 6069, 6579, 7803, 8127, 9639, 10449, 12427, 15351, 18207, 19737, 23409, 24381, 28917, 37281, 46053, 54621, 59211, 70227, 73143, 86989, 111843, 138159, 163863, 177633, 260967, 335529, 414477, 491589, 782901, 1006587, 1243431, 2348703, 3019761, 7046109, 21138327]

約数ペア:

[(1, 21138327), (3, 7046109), (7, 3019761), (9, 2348703), (17, 1243431), (21, 1006587), (27, 782901), (43, 491589), (51, 414477), (63, 335529), (81, 260967), (119, 177633), (129, 163863), (153, 138159), (189, 111843), (243, 86989), (289, 73143), (301, 70227), (357, 59211), (387, 54621), (459, 46053), (567, 37281), (731, 28917), (867, 24381), (903, 23409), (1071, 19737), (1161, 18207), (1377, 15351), (1701, 12427), (2023, 10449), (2193, 9639), (2601, 8127), (2709, 7803), (3213, 6579), (3483, 6069), (4131, 5117)]