21315500

素因数分解:

$2^2\times 5^3\times {\mathrm{89}}^1\times {\mathrm{479}}^1$

素因数の和:587

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 25858900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 125, 178, 250, 356, 445, 479, 500, 890, 958, 1780, 1916, 2225, 2395, 4450, 4790, 8900, 9580, 11125, 11975, 22250, 23950, 42631, 44500, 47900, 59875, 85262, 119750, 170524, 213155, 239500, 426310, 852620, 1065775, 2131550, 4263100, 5328875, 10657750, 21315500]

約数ペア:

[(1, 21315500), (2, 10657750), (4, 5328875), (5, 4263100), (10, 2131550), (20, 1065775), (25, 852620), (50, 426310), (89, 239500), (100, 213155), (125, 170524), (178, 119750), (250, 85262), (356, 59875), (445, 47900), (479, 44500), (500, 42631), (890, 23950), (958, 22250), (1780, 11975), (1916, 11125), (2225, 9580), (2395, 8900), (4450, 4790)]