21320845

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{997}}^1$

素因数の和:1069

約数の個数: 32

約数和(自身を含む): 32191488

約数和(自身を除く): 10870643

約数列:

[1, 5, 7, 13, 35, 47, 65, 91, 235, 329, 455, 611, 997, 1645, 3055, 4277, 4985, 6979, 12961, 21385, 34895, 46859, 64805, 90727, 234295, 328013, 453635, 609167, 1640065, 3045835, 4264169, 21320845]

約数ペア:

[(1, 21320845), (5, 4264169), (7, 3045835), (13, 1640065), (35, 609167), (47, 453635), (65, 328013), (91, 234295), (235, 90727), (329, 64805), (455, 46859), (611, 34895), (997, 21385), (1645, 12961), (3055, 6979), (4277, 4985)]