19908848

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{401}}^1$

素因数の和:545

約数の個数: 40

約数和(自身を含む): 40376880

約数和(自身を除く): 20468032

約数列:

[1, 2, 4, 8, 16, 29, 58, 107, 116, 214, 232, 401, 428, 464, 802, 856, 1604, 1712, 3103, 3208, 6206, 6416, 11629, 12412, 23258, 24824, 42907, 46516, 49648, 85814, 93032, 171628, 186064, 343256, 686512, 1244303, 2488606, 4977212, 9954424, 19908848]

約数ペア:

[(1, 19908848), (2, 9954424), (4, 4977212), (8, 2488606), (16, 1244303), (29, 686512), (58, 343256), (107, 186064), (116, 171628), (214, 93032), (232, 85814), (401, 49648), (428, 46516), (464, 42907), (802, 24824), (856, 23258), (1604, 12412), (1712, 11629), (3103, 6416), (3208, 6206)]