20918744

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1171}}^1$

素因数の和:1224

約数の個数: 64

約数和(自身を含む): 50630400

約数和(自身を除く): 29711656

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 29, 44, 56, 58, 77, 88, 116, 154, 203, 232, 308, 319, 406, 616, 638, 812, 1171, 1276, 1624, 2233, 2342, 2552, 4466, 4684, 8197, 8932, 9368, 12881, 16394, 17864, 25762, 32788, 33959, 51524, 65576, 67918, 90167, 103048, 135836, 180334, 237713, 271672, 360668, 373549, 475426, 721336, 747098, 950852, 1494196, 1901704, 2614843, 2988392, 5229686, 10459372, 20918744]

約数ペア:

[(1, 20918744), (2, 10459372), (4, 5229686), (7, 2988392), (8, 2614843), (11, 1901704), (14, 1494196), (22, 950852), (28, 747098), (29, 721336), (44, 475426), (56, 373549), (58, 360668), (77, 271672), (88, 237713), (116, 180334), (154, 135836), (203, 103048), (232, 90167), (308, 67918), (319, 65576), (406, 51524), (616, 33959), (638, 32788), (812, 25762), (1171, 17864), (1276, 16394), (1624, 12881), (2233, 9368), (2342, 8932), (2552, 8197), (4466, 4684)]