21165368

素因数分解:

$2^3\times 7^1\times {\mathrm{151}}^1\times {\mathrm{2503}}^1$

素因数の和:2667

約数の個数: 32

約数和(自身を含む): 45672960

約数和(自身を除く): 24507592

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 151, 302, 604, 1057, 1208, 2114, 2503, 4228, 5006, 8456, 10012, 17521, 20024, 35042, 70084, 140168, 377953, 755906, 1511812, 2645671, 3023624, 5291342, 10582684, 21165368]

約数ペア:

[(1, 21165368), (2, 10582684), (4, 5291342), (7, 3023624), (8, 2645671), (14, 1511812), (28, 755906), (56, 377953), (151, 140168), (302, 70084), (604, 35042), (1057, 20024), (1208, 17521), (2114, 10012), (2503, 8456), (4228, 5006)]