20210509

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 23940000

約数和(自身を除く): 3729491

約数列:

[1, 11, 19, 59, 121, 149, 209, 649, 1121, 1639, 2299, 2831, 7139, 8791, 12331, 18029, 31141, 96701, 135641, 167029, 342551, 1063711, 1837319, 20210509]

約数ペア:

[(1, 20210509), (11, 1837319), (19, 1063711), (59, 342551), (121, 167029), (149, 135641), (209, 96701), (649, 31141), (1121, 18029), (1639, 12331), (2299, 8791), (2831, 7139)]