21367385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{317}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 29810592

約数和(自身を除く): 8443207

約数列:

[1, 5, 13, 17, 61, 65, 85, 221, 305, 317, 793, 1037, 1105, 1585, 3965, 4121, 5185, 5389, 13481, 19337, 20605, 26945, 67405, 70057, 96685, 251381, 328729, 350285, 1256905, 1643645, 4273477, 21367385]

約数ペア:

[(1, 21367385), (5, 4273477), (13, 1643645), (17, 1256905), (61, 350285), (65, 328729), (85, 251381), (221, 96685), (305, 70057), (317, 67405), (793, 26945), (1037, 20605), (1105, 19337), (1585, 13481), (3965, 5389), (4121, 5185)]