20112220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11299}}^1$

素因数の和:11397

約数の個数: 24

約数和(自身を含む): 42714000

約数和(自身を除く): 22601780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11299, 22598, 45196, 56495, 112990, 225980, 1005611, 2011222, 4022444, 5028055, 10056110, 20112220]

約数ペア:

[(1, 20112220), (2, 10056110), (4, 5028055), (5, 4022444), (10, 2011222), (20, 1005611), (89, 225980), (178, 112990), (356, 56495), (445, 45196), (890, 22598), (1780, 11299)]