21219950

素因数分解:

$2^1\times 5^2\times {\mathrm{389}}^1\times {\mathrm{1091}}^1$

素因数の和:1492

約数の個数: 24

約数和(自身を含む): 39606840

約数和(自身を除く): 18386890

約数列:

[1, 2, 5, 10, 25, 50, 389, 778, 1091, 1945, 2182, 3890, 5455, 9725, 10910, 19450, 27275, 54550, 424399, 848798, 2121995, 4243990, 10609975, 21219950]

約数ペア:

[(1, 21219950), (2, 10609975), (5, 4243990), (10, 2121995), (25, 848798), (50, 424399), (389, 54550), (778, 27275), (1091, 19450), (1945, 10910), (2182, 9725), (3890, 5455)]