21690190

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{24371}}^1$

素因数の和:24467

約数の個数: 16

約数和(自身を含む): 39482640

約数和(自身を除く): 17792450

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 24371, 48742, 121855, 243710, 2169019, 4338038, 10845095, 21690190]

約数ペア:

[(1, 21690190), (2, 10845095), (5, 4338038), (10, 2169019), (89, 243710), (178, 121855), (445, 48742), (890, 24371)]