21979216

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 51603840

約数和(自身を除く): 29624624

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 56, 58, 67, 101, 112, 116, 134, 202, 203, 232, 268, 404, 406, 464, 469, 536, 707, 808, 812, 938, 1072, 1414, 1616, 1624, 1876, 1943, 2828, 2929, 3248, 3752, 3886, 5656, 5858, 6767, 7504, 7772, 11312, 11716, 13534, 13601, 15544, 20503, 23432, 27068, 27202, 31088, 41006, 46864, 47369, 54136, 54404, 82012, 94738, 108272, 108808, 164024, 189476, 196243, 217616, 328048, 378952, 392486, 757904, 784972, 1373701, 1569944, 2747402, 3139888, 5494804, 10989608, 21979216]

約数ペア:

[(1, 21979216), (2, 10989608), (4, 5494804), (7, 3139888), (8, 2747402), (14, 1569944), (16, 1373701), (28, 784972), (29, 757904), (56, 392486), (58, 378952), (67, 328048), (101, 217616), (112, 196243), (116, 189476), (134, 164024), (202, 108808), (203, 108272), (232, 94738), (268, 82012), (404, 54404), (406, 54136), (464, 47369), (469, 46864), (536, 41006), (707, 31088), (808, 27202), (812, 27068), (938, 23432), (1072, 20503), (1414, 15544), (1616, 13601), (1624, 13534), (1876, 11716), (1943, 11312), (2828, 7772), (2929, 7504), (3248, 6767), (3752, 5858), (3886, 5656)]