21930293

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 30533760

約数和(自身を除く): 8603467

約数列:

[1, 7, 11, 23, 29, 49, 61, 77, 161, 203, 253, 319, 427, 539, 667, 671, 1127, 1403, 1421, 1769, 1771, 2233, 2989, 4669, 4697, 7337, 9821, 12383, 12397, 15433, 15631, 19459, 32683, 32879, 40687, 51359, 68747, 86681, 108031, 136213, 284809, 359513, 447557, 756217, 953491, 1993663, 3132899, 21930293]

約数ペア:

[(1, 21930293), (7, 3132899), (11, 1993663), (23, 953491), (29, 756217), (49, 447557), (61, 359513), (77, 284809), (161, 136213), (203, 108031), (253, 86681), (319, 68747), (427, 51359), (539, 40687), (667, 32879), (671, 32683), (1127, 19459), (1403, 15631), (1421, 15433), (1769, 12397), (1771, 12383), (2233, 9821), (2989, 7337), (4669, 4697)]