21090128

素因数分解:

$2^4\times {\mathrm{97}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:339

約数の個数: 40

約数和(自身を含む): 41997312

約数和(自身を除く): 20907184

約数列:

[1, 2, 4, 8, 16, 97, 107, 127, 194, 214, 254, 388, 428, 508, 776, 856, 1016, 1552, 1712, 2032, 10379, 12319, 13589, 20758, 24638, 27178, 41516, 49276, 54356, 83032, 98552, 108712, 166064, 197104, 217424, 1318133, 2636266, 5272532, 10545064, 21090128]

約数ペア:

[(1, 21090128), (2, 10545064), (4, 5272532), (8, 2636266), (16, 1318133), (97, 217424), (107, 197104), (127, 166064), (194, 108712), (214, 98552), (254, 83032), (388, 54356), (428, 49276), (508, 41516), (776, 27178), (856, 24638), (1016, 20758), (1552, 13589), (1712, 12319), (2032, 10379)]