21000979311

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{419}}^1\times {\mathrm{787}}^1$

素因数の和:1316

約数の個数: 64

約数和(自身を含む): 32026337280

約数和(自身を除く): 11025357969

約数列:

[1, 3, 13, 23, 39, 69, 71, 213, 299, 419, 787, 897, 923, 1257, 1633, 2361, 2769, 4899, 5447, 9637, 10231, 16341, 18101, 21229, 28911, 29749, 30693, 54303, 55877, 63687, 89247, 125281, 167631, 235313, 329753, 375843, 386737, 684227, 705939, 726401, 989259, 1160211, 1285171, 2052681, 2179203, 3855513, 4286789, 7584319, 8894951, 12860367, 16707223, 22752957, 23412463, 26684853, 50121669, 70237389, 98596147, 295788441, 304362019, 538486649, 913086057, 1615459947, 7000326437, 21000979311]

約数ペア:

[(1, 21000979311), (3, 7000326437), (13, 1615459947), (23, 913086057), (39, 538486649), (69, 304362019), (71, 295788441), (213, 98596147), (299, 70237389), (419, 50121669), (787, 26684853), (897, 23412463), (923, 22752957), (1257, 16707223), (1633, 12860367), (2361, 8894951), (2769, 7584319), (4899, 4286789), (5447, 3855513), (9637, 2179203), (10231, 2052681), (16341, 1285171), (18101, 1160211), (21229, 989259), (28911, 726401), (29749, 705939), (30693, 684227), (54303, 386737), (55877, 375843), (63687, 329753), (89247, 235313), (125281, 167631)]