21213555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{1549}}^1$

素因数の和:1651

約数の個数: 32

約数和(自身を含む): 37497600

約数和(自身を除く): 16284045

約数列:

[1, 3, 5, 11, 15, 33, 55, 83, 165, 249, 415, 913, 1245, 1549, 2739, 4565, 4647, 7745, 13695, 17039, 23235, 51117, 85195, 128567, 255585, 385701, 642835, 1414237, 1928505, 4242711, 7071185, 21213555]

約数ペア:

[(1, 21213555), (3, 7071185), (5, 4242711), (11, 1928505), (15, 1414237), (33, 642835), (55, 385701), (83, 255585), (165, 128567), (249, 85195), (415, 51117), (913, 23235), (1245, 17039), (1549, 13695), (2739, 7745), (4565, 4647)]