21987826

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{631}}^1$

素因数の和:790

約数の個数: 32

約数和(自身を含む): 40043520

約数和(自身を除く): 18055694

約数列:

[1, 2, 7, 14, 19, 38, 131, 133, 262, 266, 631, 917, 1262, 1834, 2489, 4417, 4978, 8834, 11989, 17423, 23978, 34846, 82661, 83923, 165322, 167846, 578627, 1157254, 1570559, 3141118, 10993913, 21987826]

約数ペア:

[(1, 21987826), (2, 10993913), (7, 3141118), (14, 1570559), (19, 1157254), (38, 578627), (131, 167846), (133, 165322), (262, 83923), (266, 82661), (631, 34846), (917, 23978), (1262, 17423), (1834, 11989), (2489, 8834), (4417, 4978)]