21315556

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{401}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 38056536

約数和(自身を除く): 16740980

約数列:

[1, 2, 4, 97, 137, 194, 274, 388, 401, 548, 802, 1604, 13289, 26578, 38897, 53156, 54937, 77794, 109874, 155588, 219748, 5328889, 10657778, 21315556]

約数ペア:

[(1, 21315556), (2, 10657778), (4, 5328889), (97, 219748), (137, 155588), (194, 109874), (274, 77794), (388, 54937), (401, 53156), (548, 38897), (802, 26578), (1604, 13289)]