21004191

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 34754720

約数和(自身を除く): 13750529

約数列:

[1, 3, 9, 13, 27, 39, 61, 81, 109, 117, 183, 243, 327, 351, 549, 793, 981, 1053, 1417, 1647, 2379, 2943, 3159, 4251, 4941, 6649, 7137, 8829, 12753, 14823, 19947, 21411, 26487, 38259, 59841, 64233, 86437, 114777, 179523, 192699, 259311, 344331, 538569, 777933, 1615707, 2333799, 7001397, 21004191]

約数ペア:

[(1, 21004191), (3, 7001397), (9, 2333799), (13, 1615707), (27, 777933), (39, 538569), (61, 344331), (81, 259311), (109, 192699), (117, 179523), (183, 114777), (243, 86437), (327, 64233), (351, 59841), (549, 38259), (793, 26487), (981, 21411), (1053, 19947), (1417, 14823), (1647, 12753), (2379, 8829), (2943, 7137), (3159, 6649), (4251, 4941)]