20997416

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 24621784

約数列:

[1, 2, 4, 8, 11, 22, 31, 43, 44, 62, 86, 88, 124, 172, 179, 248, 341, 344, 358, 473, 682, 716, 946, 1333, 1364, 1432, 1892, 1969, 2666, 2728, 3784, 3938, 5332, 5549, 7697, 7876, 10664, 11098, 14663, 15394, 15752, 22196, 29326, 30788, 44392, 58652, 61039, 61576, 84667, 117304, 122078, 169334, 238607, 244156, 338668, 477214, 488312, 677336, 954428, 1908856, 2624677, 5249354, 10498708, 20997416]

約数ペア:

[(1, 20997416), (2, 10498708), (4, 5249354), (8, 2624677), (11, 1908856), (22, 954428), (31, 677336), (43, 488312), (44, 477214), (62, 338668), (86, 244156), (88, 238607), (124, 169334), (172, 122078), (179, 117304), (248, 84667), (341, 61576), (344, 61039), (358, 58652), (473, 44392), (682, 30788), (716, 29326), (946, 22196), (1333, 15752), (1364, 15394), (1432, 14663), (1892, 11098), (1969, 10664), (2666, 7876), (2728, 7697), (3784, 5549), (3938, 5332)]