21317978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:502

約数の個数: 32

約数和(自身を含む): 36391680

約数和(自身を除く): 15073702

約数列:

[1, 2, 11, 22, 47, 53, 94, 106, 389, 517, 583, 778, 1034, 1166, 2491, 4279, 4982, 8558, 18283, 20617, 27401, 36566, 41234, 54802, 201113, 226787, 402226, 453574, 968999, 1937998, 10658989, 21317978]

約数ペア:

[(1, 21317978), (2, 10658989), (11, 1937998), (22, 968999), (47, 453574), (53, 402226), (94, 226787), (106, 201113), (389, 54802), (517, 41234), (583, 36566), (778, 27401), (1034, 20617), (1166, 18283), (2491, 8558), (4279, 4982)]