21069321

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1087}}^1$

素因数の和:1181

約数の個数: 32

約数和(自身を含む): 35094528

約数和(自身を除く): 14025207

約数列:

[1, 3, 7, 13, 21, 39, 71, 91, 213, 273, 497, 923, 1087, 1491, 2769, 3261, 6461, 7609, 14131, 19383, 22827, 42393, 77177, 98917, 231531, 296751, 540239, 1003301, 1620717, 3009903, 7023107, 21069321]

約数ペア:

[(1, 21069321), (3, 7023107), (7, 3009903), (13, 1620717), (21, 1003301), (39, 540239), (71, 296751), (91, 231531), (213, 98917), (273, 77177), (497, 42393), (923, 22827), (1087, 19383), (1491, 14131), (2769, 7609), (3261, 6461)]