21860405

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 31159296

約数和(自身を除く): 9298891

約数列:

[1, 5, 7, 35, 47, 97, 137, 235, 329, 485, 679, 685, 959, 1645, 3395, 4559, 4795, 6439, 13289, 22795, 31913, 32195, 45073, 66445, 93023, 159565, 225365, 465115, 624583, 3122915, 4372081, 21860405]

約数ペア:

[(1, 21860405), (5, 4372081), (7, 3122915), (35, 624583), (47, 465115), (97, 225365), (137, 159565), (235, 93023), (329, 66445), (485, 45073), (679, 32195), (685, 31913), (959, 22795), (1645, 13289), (3395, 6439), (4559, 4795)]