21115045

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{293}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 9366875

約数列:

[1, 5, 7, 29, 35, 71, 145, 203, 293, 355, 497, 1015, 1465, 2051, 2059, 2485, 8497, 10255, 10295, 14413, 20803, 42485, 59479, 72065, 104015, 145621, 297395, 603287, 728105, 3016435, 4223009, 21115045]

約数ペア:

[(1, 21115045), (5, 4223009), (7, 3016435), (29, 728105), (35, 603287), (71, 297395), (145, 145621), (203, 104015), (293, 72065), (355, 59479), (497, 42485), (1015, 20803), (1465, 14413), (2051, 10295), (2059, 10255), (2485, 8497)]