21903021

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^2\times {\mathrm{401}}^1$

素因数の和:451

約数の個数: 48

約数和(自身を含む): 39492480

約数和(自身を除く): 17589459

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 119, 153, 189, 289, 357, 401, 459, 867, 1071, 1203, 2023, 2601, 2807, 3213, 3609, 6069, 6817, 7803, 8421, 10827, 18207, 20451, 25263, 47719, 54621, 61353, 75789, 115889, 143157, 184059, 347667, 429471, 811223, 1043001, 1288413, 2433669, 3129003, 7301007, 21903021]

約数ペア:

[(1, 21903021), (3, 7301007), (7, 3129003), (9, 2433669), (17, 1288413), (21, 1043001), (27, 811223), (51, 429471), (63, 347667), (119, 184059), (153, 143157), (189, 115889), (289, 75789), (357, 61353), (401, 54621), (459, 47719), (867, 25263), (1071, 20451), (1203, 18207), (2023, 10827), (2601, 8421), (2807, 7803), (3213, 6817), (3609, 6069)]