19915708

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{1301}}^1$

素因数の和:1437

約数の個数: 24

約数和(自身を含む): 36091440

約数和(自身を除く): 16175732

約数列:

[1, 2, 4, 43, 86, 89, 172, 178, 356, 1301, 2602, 3827, 5204, 7654, 15308, 55943, 111886, 115789, 223772, 231578, 463156, 4978927, 9957854, 19915708]

約数ペア:

[(1, 19915708), (2, 9957854), (4, 4978927), (43, 463156), (86, 231578), (89, 223772), (172, 115789), (178, 111886), (356, 55943), (1301, 15308), (2602, 7654), (3827, 5204)]