21055280

素因数分解:

$2^4\times 5^1\times {\mathrm{263191}}^1$

素因数の和:263204

約数の個数: 20

約数和(自身を含む): 48953712

約数和(自身を除く): 27898432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263191, 526382, 1052764, 1315955, 2105528, 2631910, 4211056, 5263820, 10527640, 21055280]

約数ペア:

[(1, 21055280), (2, 10527640), (4, 5263820), (5, 4211056), (8, 2631910), (10, 2105528), (16, 1315955), (20, 1052764), (40, 526382), (80, 263191)]