21499408

素因数分解:

$2^4\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1381}}^1$

素因数の和:1535

約数の個数: 40

約数和(自身を含む): 47983040

約数和(自身を除く): 26483632

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 139, 278, 556, 973, 1112, 1381, 1946, 2224, 2762, 3892, 5524, 7784, 9667, 11048, 15568, 19334, 22096, 38668, 77336, 154672, 191959, 383918, 767836, 1343713, 1535672, 2687426, 3071344, 5374852, 10749704, 21499408]

約数ペア:

[(1, 21499408), (2, 10749704), (4, 5374852), (7, 3071344), (8, 2687426), (14, 1535672), (16, 1343713), (28, 767836), (56, 383918), (112, 191959), (139, 154672), (278, 77336), (556, 38668), (973, 22096), (1112, 19334), (1381, 15568), (1946, 11048), (2224, 9667), (2762, 7784), (3892, 5524)]