22782220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12799}}^1$

素因数の和:12897

約数の個数: 24

約数和(自身を含む): 48384000

約数和(自身を除く): 25601780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12799, 25598, 51196, 63995, 127990, 255980, 1139111, 2278222, 4556444, 5695555, 11391110, 22782220]

約数ペア:

[(1, 22782220), (2, 11391110), (4, 5695555), (5, 4556444), (10, 2278222), (20, 1139111), (89, 255980), (178, 127990), (356, 63995), (445, 51196), (890, 25598), (1780, 12799)]