21514491

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13080069

約数列:

[1, 3, 9, 27, 29, 43, 71, 81, 87, 129, 213, 243, 261, 387, 639, 783, 1161, 1247, 1917, 2059, 2349, 3053, 3483, 3741, 5751, 6177, 7047, 9159, 10449, 11223, 17253, 18531, 27477, 33669, 55593, 82431, 88537, 101007, 166779, 247293, 265611, 303021, 500337, 741879, 796833, 2390499, 7171497, 21514491]

約数ペア:

[(1, 21514491), (3, 7171497), (9, 2390499), (27, 796833), (29, 741879), (43, 500337), (71, 303021), (81, 265611), (87, 247293), (129, 166779), (213, 101007), (243, 88537), (261, 82431), (387, 55593), (639, 33669), (783, 27477), (1161, 18531), (1247, 17253), (1917, 11223), (2059, 10449), (2349, 9159), (3053, 7047), (3483, 6177), (3741, 5751)]