31331391

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 56060928

約数和(自身を除く): 24729537

約数列:

[1, 3, 7, 13, 17, 21, 39, 43, 51, 91, 119, 129, 157, 221, 273, 301, 357, 471, 559, 663, 731, 903, 1099, 1547, 1677, 2041, 2193, 2669, 3297, 3913, 4641, 5117, 6123, 6751, 8007, 9503, 11739, 14287, 15351, 18683, 20253, 28509, 34697, 42861, 47257, 56049, 66521, 87763, 104091, 114767, 141771, 199563, 242879, 263289, 344301, 614341, 728637, 803369, 1491971, 1843023, 2410107, 4475913, 10443797, 31331391]

約数ペア:

[(1, 31331391), (3, 10443797), (7, 4475913), (13, 2410107), (17, 1843023), (21, 1491971), (39, 803369), (43, 728637), (51, 614341), (91, 344301), (119, 263289), (129, 242879), (157, 199563), (221, 141771), (273, 114767), (301, 104091), (357, 87763), (471, 66521), (559, 56049), (663, 47257), (731, 42861), (903, 34697), (1099, 28509), (1547, 20253), (1677, 18683), (2041, 15351), (2193, 14287), (2669, 11739), (3297, 9503), (3913, 8007), (4641, 6751), (5117, 6123)]