21605475

素因数分解:

$3^1\times 5^2\times {\mathrm{271}}^1\times {\mathrm{1063}}^1$

素因数の和:1347

約数の個数: 24

約数和(自身を含む): 35886592

約数和(自身を除く): 14281117

約数列:

[1, 3, 5, 15, 25, 75, 271, 813, 1063, 1355, 3189, 4065, 5315, 6775, 15945, 20325, 26575, 79725, 288073, 864219, 1440365, 4321095, 7201825, 21605475]

約数ペア:

[(1, 21605475), (3, 7201825), (5, 4321095), (15, 1440365), (25, 864219), (75, 288073), (271, 79725), (813, 26575), (1063, 20325), (1355, 15945), (3189, 6775), (4065, 5315)]