21369560

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{1097}}^1$

素因数の和:1595

約数の個数: 32

約数和(自身を含む): 48224160

約数和(自身を除く): 26854600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1097, 1948, 2194, 2435, 3896, 4388, 4870, 5485, 8776, 9740, 10970, 19480, 21940, 43880, 534239, 1068478, 2136956, 2671195, 4273912, 5342390, 10684780, 21369560]

約数ペア:

[(1, 21369560), (2, 10684780), (4, 5342390), (5, 4273912), (8, 2671195), (10, 2136956), (20, 1068478), (40, 534239), (487, 43880), (974, 21940), (1097, 19480), (1948, 10970), (2194, 9740), (2435, 8776), (3896, 5485), (4388, 4870)]