21123116

素因数分解:

$2^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{2293}}^1$

素因数の和:2358

約数の個数: 36

約数和(自身を含む): 43934688

約数和(自身を除く): 22811572

約数列:

[1, 2, 4, 7, 14, 28, 47, 49, 94, 98, 188, 196, 329, 658, 1316, 2293, 2303, 4586, 4606, 9172, 9212, 16051, 32102, 64204, 107771, 112357, 215542, 224714, 431084, 449428, 754397, 1508794, 3017588, 5280779, 10561558, 21123116]

約数ペア:

[(1, 21123116), (2, 10561558), (4, 5280779), (7, 3017588), (14, 1508794), (28, 754397), (47, 449428), (49, 431084), (94, 224714), (98, 215542), (188, 112357), (196, 107771), (329, 64204), (658, 32102), (1316, 16051), (2293, 9212), (2303, 9172), (4586, 4606)]