21286844

素因数分解:

$2^2\times {\mathrm{83}}^1\times {\mathrm{97}}^1\times {\mathrm{661}}^1$

素因数の和:845

約数の個数: 24

約数和(自身を含む): 38147088

約数和(自身を除く): 16860244

約数列:

[1, 2, 4, 83, 97, 166, 194, 332, 388, 661, 1322, 2644, 8051, 16102, 32204, 54863, 64117, 109726, 128234, 219452, 256468, 5321711, 10643422, 21286844]

約数ペア:

[(1, 21286844), (2, 10643422), (4, 5321711), (83, 256468), (97, 219452), (166, 128234), (194, 109726), (332, 64117), (388, 54863), (661, 32204), (1322, 16102), (2644, 8051)]