18831631

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:128

約数の個数: 48

約数和(自身を含む): 26199936

約数和(自身を除く): 7368305

約数列:

[1, 7, 13, 17, 37, 47, 49, 91, 119, 221, 259, 329, 481, 611, 629, 637, 799, 833, 1547, 1739, 1813, 2303, 3367, 4277, 4403, 5593, 8177, 10387, 10829, 12173, 22607, 23569, 29563, 29939, 30821, 39151, 57239, 72709, 85211, 158249, 206941, 384319, 400673, 508963, 1107743, 1448587, 2690233, 18831631]

約数ペア:

[(1, 18831631), (7, 2690233), (13, 1448587), (17, 1107743), (37, 508963), (47, 400673), (49, 384319), (91, 206941), (119, 158249), (221, 85211), (259, 72709), (329, 57239), (481, 39151), (611, 30821), (629, 29939), (637, 29563), (799, 23569), (833, 22607), (1547, 12173), (1739, 10829), (1813, 10387), (2303, 8177), (3367, 5593), (4277, 4403)]