21476819

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 27748224

約数和(自身を除く): 6271405

約数列:

[1, 7, 13, 53, 61, 73, 91, 371, 427, 511, 689, 793, 949, 3233, 3869, 4453, 4823, 5551, 6643, 22631, 27083, 31171, 42029, 50297, 57889, 236009, 294203, 352079, 405223, 1652063, 3068117, 21476819]

約数ペア:

[(1, 21476819), (7, 3068117), (13, 1652063), (53, 405223), (61, 352079), (73, 294203), (91, 236009), (371, 57889), (427, 50297), (511, 42029), (689, 31171), (793, 27083), (949, 22631), (3233, 6643), (3869, 5551), (4453, 4823)]